550900001 has 4 divisors (see below), whose sum is σ = 551189892. Its totient is φ = 550610112.

The previous prime is 550899983. The next prime is 550900043. The reversal of 550900001 is 100009055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100009055 = 5 ⋅20001811.

It can be written as a sum of positive squares in 2 ways, for example, as 230310976 + 320589025 = 15176^2 + 17905^2 .

It is a cyclic number.

It is not a de Polignac number, because 550900001 - 2²² = 546705697 is a prime.

It is a super-2 number, since 2×550900001² = 606981622203600002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550900081) 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, 142076 + ... + 145901.

It is an arithmetic number, because the mean of its divisors is an integer number (137797473).

Almost surely, 2^550900001 is an apocalyptic number.

It is an amenable number.

550900001 is a deficient number, since it is larger than the sum of its proper divisors (289891).

550900001 is a wasteful number, since it uses less digits than its factorization.

550900001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289890.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 550900001 is about 23471.2590416450. The cubic root of 550900001 is about 819.7679300643.

Adding to 550900001 its reverse (100009055), we get a palindrome (650909056).

The spelling of 550900001 in words is "five hundred fifty million, nine hundred thousand, one".