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55048189 = 77864027
BaseRepresentation
bin1101000111111…
…1011111111101
310211120201220211
43101333133331
5103043020224
65243512421
71235621230
oct321773775
9124521824
1055048189
1129089579
1216528711
13b5350c1
14744d417
154c75894
hex347f7fd

55048189 has 4 divisors (see below), whose sum is σ = 62912224. Its totient is φ = 47184156.

The previous prime is 55048171. The next prime is 55048211. The reversal of 55048189 is 98184055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55048189 - 29 = 55047677 is a prime.

It is a super-2 number, since 2×550481892 = 6060606224359442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55048129) 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, 3932007 + ... + 3932020.

It is an arithmetic number, because the mean of its divisors is an integer number (15728056).

Almost surely, 255048189 is an apocalyptic number.

It is an amenable number.

55048189 is a deficient number, since it is larger than the sum of its proper divisors (7864035).

55048189 is an equidigital number, since it uses as much as digits as its factorization.

55048189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864034.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 55048189 is about 7419.4466774821. The cubic root of 55048189 is about 380.4062806095.

The spelling of 55048189 in words is "fifty-five million, forty-eight thousand, one hundred eighty-nine".

Divisors: 1 7 7864027 55048189