31055090 has 32 divisors (see below), whose sum is σ = 64571904. Its totient is φ = 10627840.

The previous prime is 31055077. The next prime is 31055093. The reversal of 31055090 is 9055013.

It is a super-2 number, since 2×31055090² = 1928837229816200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31055093) 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, 6434 + ... + 10173.

It is an arithmetic number, because the mean of its divisors is an integer number (2017872).

Almost surely, 2^31055090 is an apocalyptic number.

31055090 is an abundant number, since it is smaller than the sum of its proper divisors (33516814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31055090 is a wasteful number, since it uses less digits than its factorization.

31055090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16642.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 31055090 is about 5572.7093948994. The cubic root of 31055090 is about 314.3240396985.

The spelling of 31055090 in words is "thirty-one million, fifty-five thousand, ninety".