31140332537 has 2 divisors, whose sum is σ = 31140332538. Its totient is φ = 31140332536.

The previous prime is 31140332467. The next prime is 31140332557. The reversal of 31140332537 is 73523304113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23892194041 + 7248138496 = 154571^2 + 85136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31140332537 is a prime.

It is not a weakly prime, because it can be changed into another prime (31140332557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15570166268 + 15570166269.

It is an arithmetic number, because the mean of its divisors is an integer number (15570166269).

Almost surely, 2^31140332537 is an apocalyptic number.

It is an amenable number.

31140332537 is a deficient number, since it is larger than the sum of its proper divisors (1).

31140332537 is an equidigital number, since it uses as much as digits as its factorization.

31140332537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 32.

The spelling of 31140332537 in words is "thirty-one billion, one hundred forty million, three hundred thirty-two thousand, five hundred thirty-seven".