31957206451 has 2 divisors, whose sum is σ = 31957206452. Its totient is φ = 31957206450.

The previous prime is 31957206443. The next prime is 31957206511. The reversal of 31957206451 is 15460275913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31957206451 - 2³ = 31957206443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31957206398 and 31957206407.

It is not a weakly prime, because it can be changed into another prime (31957206401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15978603225 + 15978603226.

It is an arithmetic number, because the mean of its divisors is an integer number (15978603226).

Almost surely, 2^31957206451 is an apocalyptic number.

31957206451 is a deficient number, since it is larger than the sum of its proper divisors (1).

31957206451 is an equidigital number, since it uses as much as digits as its factorization.

31957206451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 31957206451 in words is "thirty-one billion, nine hundred fifty-seven million, two hundred six thousand, four hundred fifty-one".