55310990 has 32 divisors (see below), whose sum is σ = 114056640. Its totient is φ = 18918144.

The previous prime is 55310989. The next prime is 55310993. The reversal of 55310990 is 9901355.

It is a super-2 number, since 2×55310990² = 6118611229560200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55310993) 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, 42266 + ... + 43554.

It is an arithmetic number, because the mean of its divisors is an integer number (3564270).

Almost surely, 2^55310990 is an apocalyptic number.

55310990 is an abundant number, since it is smaller than the sum of its proper divisors (58745650).

55310990 is a wasteful number, since it uses less digits than its factorization.

55310990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 55310990 is about 7437.1358734395. The cubic root of 55310990 is about 381.0106752037.

The spelling of 55310990 in words is "fifty-five million, three hundred ten thousand, nine hundred ninety".