31662225487 has 2 divisors, whose sum is σ = 31662225488. Its totient is φ = 31662225486.

The previous prime is 31662225457. The next prime is 31662225557. The reversal of 31662225487 is 78452226613.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31662225487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31662225407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831112743 + 15831112744.

It is an arithmetic number, because the mean of its divisors is an integer number (15831112744).

Almost surely, 2^31662225487 is an apocalyptic number.

31662225487 is a deficient number, since it is larger than the sum of its proper divisors (1).

31662225487 is an equidigital number, since it uses as much as digits as its factorization.

31662225487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 46.

The spelling of 31662225487 in words is "thirty-one billion, six hundred sixty-two million, two hundred twenty-five thousand, four hundred eighty-seven".