31142955 has 16 divisors (see below), whose sum is σ = 51547680. Its totient is φ = 16036608.

The previous prime is 31142953. The next prime is 31142981. The reversal of 31142955 is 55924113.

It is not a de Polignac number, because 31142955 - 2¹ = 31142953 is a prime.

It is a super-2 number, since 2×31142955² = 1939767292264050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31142953) 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, 35362 + ... + 36231.

It is an arithmetic number, because the mean of its divisors is an integer number (3221730).

Almost surely, 2^31142955 is an apocalyptic number.

31142955 is a deficient number, since it is larger than the sum of its proper divisors (20404725).

31142955 is a wasteful number, since it uses less digits than its factorization.

31142955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71630.

The product of its digits is 5400, while the sum is 30.

The square root of 31142955 is about 5580.5873346808. The cubic root of 31142955 is about 314.6202023754.

The spelling of 31142955 in words is "thirty-one million, one hundred forty-two thousand, nine hundred fifty-five".