1631490131 has 2 divisors, whose sum is σ = 1631490132. Its totient is φ = 1631490130.

The previous prime is 1631490109. The next prime is 1631490169. The reversal of 1631490131 is 1310941361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1631490131 - 2¹⁸ = 1631227987 is a prime.

It is a super-2 number, since 2×1631490131² = 5323520095100794322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1631490094 and 1631490103.

It is not a weakly prime, because it can be changed into another prime (1631490031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815745065 + 815745066.

It is an arithmetic number, because the mean of its divisors is an integer number (815745066).

Almost surely, 2^1631490131 is an apocalyptic number.

1631490131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631490131 is an equidigital number, since it uses as much as digits as its factorization.

1631490131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1631490131 is about 40391.7086912648. The cubic root of 1631490131 is about 1177.2304411637.

The spelling of 1631490131 in words is "one billion, six hundred thirty-one million, four hundred ninety thousand, one hundred thirty-one".