31142995 has 32 divisors (see below), whose sum is σ = 42900480. Its totient is φ = 21513600.

The previous prime is 31142987. The next prime is 31143017. The reversal of 31142995 is 59924113.

It is not a de Polignac number, because 31142995 - 2³ = 31142987 is a prime.

It is a super-2 number, since 2×31142995² = 1939772275140050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31142995.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186402 + ... + 186568.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^31142995 is an apocalyptic number.

31142995 is a deficient number, since it is larger than the sum of its proper divisors (11757485).

31142995 is a wasteful number, since it uses less digits than its factorization.

31142995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355.

The product of its digits is 9720, while the sum is 34.

The square root of 31142995 is about 5580.5909185318. The cubic root of 31142995 is about 314.6203370747.

The spelling of 31142995 in words is "thirty-one million, one hundred forty-two thousand, nine hundred ninety-five".