31257104 has 10 divisors (see below), whose sum is σ = 60560670. Its totient is φ = 15628544.

The previous prime is 31257103. The next prime is 31257133. The reversal of 31257104 is 40175213.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 565504 = 5540^2 + 752^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31257104.

It is not an unprimeable number, because it can be changed into a prime (31257103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976769 + ... + 976800.

It is an arithmetic number, because the mean of its divisors is an integer number (6056067).

Almost surely, 2^31257104 is an apocalyptic number.

It is an amenable number.

31257104 is a deficient number, since it is larger than the sum of its proper divisors (29303566).

31257104 is a wasteful number, since it uses less digits than its factorization.

31257104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953577 (or 1953571 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 31257104 is about 5590.8053087190. The cubic root of 31257104 is about 315.0041286097.

The spelling of 31257104 in words is "thirty-one million, two hundred fifty-seven thousand, one hundred four".