725771331 has 12 divisors (see below), whose sum is σ = 1066105560. Its totient is φ = 475646400.

The previous prime is 725771323. The next prime is 725771353. The reversal of 725771331 is 133177527.

725771331 is a `hidden beast` number, since 7 + 257 + 71 + 331 = 666.

It is not a de Polignac number, because 725771331 - 2³ = 725771323 is a prime.

It is a super-2 number, since 2×725771331² = 1053488049803023122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (725771131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682870 + ... + 683931.

It is an arithmetic number, because the mean of its divisors is an integer number (88842130).

Almost surely, 2^725771331 is an apocalyptic number.

725771331 is a deficient number, since it is larger than the sum of its proper divisors (340334229).

725771331 is a wasteful number, since it uses less digits than its factorization.

725771331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366866 (or 1366863 counting only the distinct ones).

The product of its digits is 30870, while the sum is 36.

The square root of 725771331 is about 26940.1434851413. The cubic root of 725771331 is about 898.6693632724.

The spelling of 725771331 in words is "seven hundred twenty-five million, seven hundred seventy-one thousand, three hundred thirty-one".