2505749531 has 2 divisors, whose sum is σ = 2505749532. Its totient is φ = 2505749530.

The previous prime is 2505749509. The next prime is 2505749551. The reversal of 2505749531 is 1359475052.

2505749531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505749531 is a prime.

It is a super-2 number, since 2×2505749531² = 12557561424213439922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2505749551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252874765 + 1252874766.

It is an arithmetic number, because the mean of its divisors is an integer number (1252874766).

Almost surely, 2^2505749531 is an apocalyptic number.

2505749531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505749531 is an equidigital number, since it uses as much as digits as its factorization.

2505749531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 2505749531 is about 50057.4622908513. The cubic root of 2505749531 is about 1358.2484535902.

The spelling of 2505749531 in words is "two billion, five hundred five million, seven hundred forty-nine thousand, five hundred thirty-one".