31722525073 has 2 divisors, whose sum is σ = 31722525074. Its totient is φ = 31722525072.

The previous prime is 31722525061. The next prime is 31722525089. The reversal of 31722525073 is 37052522713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22109310864 + 9613214209 = 148692^2 + 98047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31722525073 is a prime.

It is a super-2 number, since 2×31722525073² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31722525013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15861262536 + 15861262537.

It is an arithmetic number, because the mean of its divisors is an integer number (15861262537).

Almost surely, 2^31722525073 is an apocalyptic number.

It is an amenable number.

31722525073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31722525073 is an equidigital number, since it uses as much as digits as its factorization.

31722525073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 37.

The spelling of 31722525073 in words is "thirty-one billion, seven hundred twenty-two million, five hundred twenty-five thousand, seventy-three".