3131131400 has 48 divisors (see below), whose sum is σ = 7708117140. Its totient is φ = 1178777600.

The previous prime is 3131131379. The next prime is 3131131459. The reversal of 3131131400 is 41311313.

It can be written as a sum of positive squares in 6 ways, for example, as 703204324 + 2427927076 = 26518^2 + 49274^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457061 + ... + 463860.

Almost surely, 2^3131131400 is an apocalyptic number.

It is an amenable number.

3131131400 is an abundant number, since it is smaller than the sum of its proper divisors (4576985740).

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

3131131400 is a wasteful number, since it uses less digits than its factorization.

3131131400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920954 (or 920945 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3131131400 is about 55956.5134725172. The cubic root of 3131131400 is about 1462.9644216246.

Adding to 3131131400 its reverse (41311313), we get a palindrome (3172442713).

The spelling of 3131131400 in words is "three billion, one hundred thirty-one million, one hundred thirty-one thousand, four hundred".