725751331 has 4 divisors (see below), whose sum is σ = 728228592. Its totient is φ = 723274072.

The previous prime is 725751329. The next prime is 725751347. The reversal of 725751331 is 133157527.

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 725751331 - 2¹ = 725751329 is a prime.

It is a super-2 number, since 2×725751331² = 1053429988896543122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725751371) 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, 1238191 + ... + 1238776.

It is an arithmetic number, because the mean of its divisors is an integer number (182057148).

Almost surely, 2^725751331 is an apocalyptic number.

725751331 is a deficient number, since it is larger than the sum of its proper divisors (2477261).

725751331 is a wasteful number, since it uses less digits than its factorization.

725751331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477260.

The product of its digits is 22050, while the sum is 34.

The square root of 725751331 is about 26939.7722893123. The cubic root of 725751331 is about 898.6611083526.

The spelling of 725751331 in words is "seven hundred twenty-five million, seven hundred fifty-one thousand, three hundred thirty-one".