31163190901 has 2 divisors, whose sum is σ = 31163190902. Its totient is φ = 31163190900.

The previous prime is 31163190871. The next prime is 31163190941. The reversal of 31163190901 is 10909136113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24328200625 + 6834990276 = 155975^2 + 82674^2 .

It is a cyclic number.

It is not a de Polignac number, because 31163190901 - 2⁵ = 31163190869 is a prime.

It is a super-2 number, since 2×31163190901² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31163190941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15581595450 + 15581595451.

It is an arithmetic number, because the mean of its divisors is an integer number (15581595451).

Almost surely, 2^31163190901 is an apocalyptic number.

It is an amenable number.

31163190901 is a deficient number, since it is larger than the sum of its proper divisors (1).

31163190901 is an equidigital number, since it uses as much as digits as its factorization.

31163190901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The spelling of 31163190901 in words is "thirty-one billion, one hundred sixty-three million, one hundred ninety thousand, nine hundred one".