725757031 has 4 divisors (see below), whose sum is σ = 743458464. Its totient is φ = 708055600.

The previous prime is 725757029. The next prime is 725757049. The reversal of 725757031 is 130757527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725757031 - 2¹ = 725757029 is a prime.

It is a super-2 number, since 2×725757031² = 1053446536091869922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725757001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8850655 + ... + 8850736.

It is an arithmetic number, because the mean of its divisors is an integer number (185864616).

Almost surely, 2^725757031 is an apocalyptic number.

725757031 is a deficient number, since it is larger than the sum of its proper divisors (17701433).

725757031 is a wasteful number, since it uses less digits than its factorization.

725757031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17701432.

The product of its (nonzero) digits is 51450, while the sum is 37.

The square root of 725757031 is about 26939.8780806447. The cubic root of 725757031 is about 898.6634610202.

The spelling of 725757031 in words is "seven hundred twenty-five million, seven hundred fifty-seven thousand, thirty-one".