31212645251 has 2 divisors, whose sum is σ = 31212645252. Its totient is φ = 31212645250.

The previous prime is 31212645239. The next prime is 31212645263. The reversal of 31212645251 is 15254621213.

It is a balanced prime because it is at equal distance from previous prime (31212645239) and next prime (31212645263).

It is a cyclic number.

It is not a de Polignac number, because 31212645251 - 2¹⁰ = 31212644227 is a prime.

It is not a weakly prime, because it can be changed into another prime (31212644251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606322625 + 15606322626.

It is an arithmetic number, because the mean of its divisors is an integer number (15606322626).

Almost surely, 2^31212645251 is an apocalyptic number.

31212645251 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212645251 is an equidigital number, since it uses as much as digits as its factorization.

31212645251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The spelling of 31212645251 in words is "thirty-one billion, two hundred twelve million, six hundred forty-five thousand, two hundred fifty-one".