31140477 has 16 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 20525472.

The previous prime is 31140469. The next prime is 31140493. The reversal of 31140477 is 77404113.

It is not a de Polignac number, because 31140477 - 2³ = 31140469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 31140477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140407) 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, 4077 + ... + 8882.

It is an arithmetic number, because the mean of its divisors is an integer number (2916000).

Almost surely, 2^31140477 is an apocalyptic number.

It is an amenable number.

31140477 is a deficient number, since it is larger than the sum of its proper divisors (15515523).

31140477 is a wasteful number, since it uses less digits than its factorization.

31140477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13057 (or 13051 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 31140477 is about 5580.3653106226. The cubic root of 31140477 is about 314.6118575288.

The spelling of 31140477 in words is "thirty-one million, one hundred forty thousand, four hundred seventy-seven".