55090911 has 16 divisors (see below), whose sum is σ = 77518080. Its totient is φ = 34731840.

The previous prime is 55090907. The next prime is 55090927. The reversal of 55090911 is 11909055.

It is not a de Polignac number, because 55090911 - 2² = 55090907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55090411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656 + ... + 10626.

It is an arithmetic number, because the mean of its divisors is an integer number (4844880).

Almost surely, 2^55090911 is an apocalyptic number.

55090911 is a deficient number, since it is larger than the sum of its proper divisors (22427169).

55090911 is a wasteful number, since it uses less digits than its factorization.

55090911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9086.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 55090911 is about 7422.3251747683. The cubic root of 55090911 is about 380.5046641955.

Adding to 55090911 its reverse (11909055), we get a palindrome (66999966).

The spelling of 55090911 in words is "fifty-five million, ninety thousand, nine hundred eleven".