245013631 has 2 divisors, whose sum is σ = 245013632. Its totient is φ = 245013630.

The previous prime is 245013617. The next prime is 245013649. The reversal of 245013631 is 136310542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245013631 - 2⁵ = 245013599 is a prime.

It is a super-2 number, since 2×245013631² = 120063358751608322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245013596 and 245013605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245013611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122506815 + 122506816.

It is an arithmetic number, because the mean of its divisors is an integer number (122506816).

Almost surely, 2^245013631 is an apocalyptic number.

245013631 is a deficient number, since it is larger than the sum of its proper divisors (1).

245013631 is an equidigital number, since it uses as much as digits as its factorization.

245013631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 245013631 is about 15652.9112627651. The cubic root of 245013631 is about 625.7440789229.

The spelling of 245013631 in words is "two hundred forty-five million, thirteen thousand, six hundred thirty-one".