31622452997 has 2 divisors, whose sum is σ = 31622452998. Its totient is φ = 31622452996.

The previous prime is 31622452993. The next prime is 31622453039. The reversal of 31622452997 is 79925422613.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16098788161 + 15523664836 = 126881^2 + 124594^2 .

It is a cyclic number.

It is not a de Polignac number, because 31622452997 - 2² = 31622452993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31622452991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15811226498 + 15811226499.

It is an arithmetic number, because the mean of its divisors is an integer number (15811226499).

Almost surely, 2^31622452997 is an apocalyptic number.

It is an amenable number.

31622452997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31622452997 is an equidigital number, since it uses as much as digits as its factorization.

31622452997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The spelling of 31622452997 in words is "thirty-one billion, six hundred twenty-two million, four hundred fifty-two thousand, nine hundred ninety-seven".