725011531 has 2 divisors, whose sum is σ = 725011532. Its totient is φ = 725011530.

The previous prime is 725011523. The next prime is 725011577. The reversal of 725011531 is 135110527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725011531 - 2³ = 725011523 is a prime.

It is a super-2 number, since 2×725011531² = 1051283440165927922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 725011496 and 725011505.

It is not a weakly prime, because it can be changed into another prime (725011591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362505765 + 362505766.

It is an arithmetic number, because the mean of its divisors is an integer number (362505766).

Almost surely, 2^725011531 is an apocalyptic number.

725011531 is a deficient number, since it is larger than the sum of its proper divisors (1).

725011531 is an equidigital number, since it uses as much as digits as its factorization.

725011531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 725011531 is about 26926.0381601156. The cubic root of 725011531 is about 898.3556522516.

It can be divided in two parts, 7250 and 11531, that added together give a palindrome (18781).

The spelling of 725011531 in words is "seven hundred twenty-five million, eleven thousand, five hundred thirty-one".