31608375401 has 2 divisors, whose sum is σ = 31608375402. Its totient is φ = 31608375400.

The previous prime is 31608375361. The next prime is 31608375413. The reversal of 31608375401 is 10457380613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30917947225 + 690428176 = 175835^2 + 26276^2 .

It is an emirp because it is prime and its reverse (10457380613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31608375401 - 2¹⁰ = 31608374377 is a prime.

It is not a weakly prime, because it can be changed into another prime (31608371401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15804187700 + 15804187701.

It is an arithmetic number, because the mean of its divisors is an integer number (15804187701).

Almost surely, 2^31608375401 is an apocalyptic number.

It is an amenable number.

31608375401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31608375401 is an equidigital number, since it uses as much as digits as its factorization.

31608375401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 31608375401 in words is "thirty-one billion, six hundred eight million, three hundred seventy-five thousand, four hundred one".