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554234881 = 641864641
BaseRepresentation
bin100001000010001…
…111010000000001
31102121220001022211
4201002033100001
52113341004011
6130555102121
716506630064
oct4102172001
91377801284
10554234881
1126493a962
12135741941
138aa93c45
14538728db
15339ccb21
hex2108f401

554234881 has 4 divisors (see below), whose sum is σ = 555100164. Its totient is φ = 553369600.

The previous prime is 554234861. The next prime is 554234893. The reversal of 554234881 is 188432455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188432455 = 537686491.

It can be written as a sum of positive squares in 2 ways, for example, as 531994225 + 22240656 = 23065^2 + 4716^2 .

It is a cyclic number.

It is not a de Polignac number, because 554234881 - 27 = 554234753 is a prime.

It is a super-2 number, since 2×5542348812 = 614352606634168322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (554234861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431680 + ... + 432961.

It is an arithmetic number, because the mean of its divisors is an integer number (138775041).

Almost surely, 2554234881 is an apocalyptic number.

It is an amenable number.

554234881 is a deficient number, since it is larger than the sum of its proper divisors (865283).

554234881 is an equidigital number, since it uses as much as digits as its factorization.

554234881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865282.

The product of its digits is 153600, while the sum is 40.

The square root of 554234881 is about 23542.1936318602. The cubic root of 554234881 is about 821.4187618712.

The spelling of 554234881 in words is "five hundred fifty-four million, two hundred thirty-four thousand, eight hundred eighty-one".

Divisors: 1 641 864641 554234881