725865311 has 4 divisors (see below), whose sum is σ = 728019552. Its totient is φ = 723711072.

The previous prime is 725865307. The next prime is 725865313. The reversal of 725865311 is 113568527.

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 725865311 - 2² = 725865307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725865313) 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, 1076615 + ... + 1077288.

It is an arithmetic number, because the mean of its divisors is an integer number (182004888).

Almost surely, 2^725865311 is an apocalyptic number.

725865311 is a deficient number, since it is larger than the sum of its proper divisors (2154241).

725865311 is a wasteful number, since it uses less digits than its factorization.

725865311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154240.

The product of its digits is 50400, while the sum is 38.

The square root of 725865311 is about 26941.8876658634. The cubic root of 725865311 is about 898.7081511100.

The spelling of 725865311 in words is "seven hundred twenty-five million, eight hundred sixty-five thousand, three hundred eleven".