31957206487 has 4 divisors (see below), whose sum is σ = 31982115960. Its totient is φ = 31932297016.

The previous prime is 31957206451. The next prime is 31957206511. The reversal of 31957206487 is 78460275913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31957206487 - 2²⁷ = 31822988759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31987206487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12452812 + ... + 12455377.

It is an arithmetic number, because the mean of its divisors is an integer number (7995528990).

It is a 1-persistent number, because it is pandigital, but 2⋅31957206487 = 63914412974 is not.

Almost surely, 2^31957206487 is an apocalyptic number.

31957206487 is a deficient number, since it is larger than the sum of its proper divisors (24909473).

31957206487 is a wasteful number, since it uses less digits than its factorization.

31957206487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24909472.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 31957206487 in words is "thirty-one billion, nine hundred fifty-seven million, two hundred six thousand, four hundred eighty-seven".