725631533 has 32 divisors (see below), whose sum is σ = 842607360. Its totient is φ = 618741760.

The previous prime is 725631509. The next prime is 725631547. The reversal of 725631533 is 335136527.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725631533 is a prime.

It is a super-2 number, since 2×725631533² = 1053082243367860178, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 725631493 and 725631502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725631503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2823341 + ... + 2823597.

It is an arithmetic number, because the mean of its divisors is an integer number (26331480).

Almost surely, 2^725631533 is an apocalyptic number.

It is an amenable number.

725631533 is a deficient number, since it is larger than the sum of its proper divisors (116975827).

725631533 is a wasteful number, since it uses less digits than its factorization.

725631533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 56700, while the sum is 35.

The square root of 725631533 is about 26937.5487563364. The cubic root of 725631533 is about 898.6116590335.

The spelling of 725631533 in words is "seven hundred twenty-five million, six hundred thirty-one thousand, five hundred thirty-three".