31521341440130 has 32 divisors (see below), whose sum is σ = 57522354801264. Its totient is φ = 12434367891456.

The previous prime is 31521341440129. The next prime is 31521341440187. The reversal of 31521341440130 is 3104414312513.

It can be written as a sum of positive squares in 8 ways, for example, as 25103717350321 + 6417624089809 = 5010361^2 + 2533303^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3764474 + ... + 8787146.

Almost surely, 2^{31521341440130} is an apocalyptic number.

31521341440130 is a deficient number, since it is larger than the sum of its proper divisors (26001013361134).

31521341440130 is a wasteful number, since it uses less digits than its factorization.

31521341440130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031350.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 31521341440130 its reverse (3104414312513), we get a palindrome (34625755752643).

The spelling of 31521341440130 in words is "thirty-one trillion, five hundred twenty-one billion, three hundred forty-one million, four hundred forty thousand, one hundred thirty".