245508631 has 2 divisors, whose sum is σ = 245508632. Its totient is φ = 245508630.

The previous prime is 245508607. The next prime is 245508643. The reversal of 245508631 is 136805542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245508631 - 2²¹ = 243411479 is a prime.

It is a super-2 number, since 2×245508631² = 120548975790988322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245508661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122754315 + 122754316.

It is an arithmetic number, because the mean of its divisors is an integer number (122754316).

Almost surely, 2^245508631 is an apocalyptic number.

245508631 is a deficient number, since it is larger than the sum of its proper divisors (1).

245508631 is an equidigital number, since it uses as much as digits as its factorization.

245508631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 245508631 is about 15668.7150398493. The cubic root of 245508631 is about 626.1651914961.

The spelling of 245508631 in words is "two hundred forty-five million, five hundred eight thousand, six hundred thirty-one".