725272531 has 4 divisors (see below), whose sum is σ = 725342992. Its totient is φ = 725202072.

The previous prime is 725272523. The next prime is 725272591. The reversal of 725272531 is 135272527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 135272527 = 13 ⋅10405579.

It is a cyclic number.

It is not a de Polignac number, because 725272531 - 2³ = 725272523 is a prime.

It is a super-2 number, since 2×725272531² = 1052040488446291922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725272591) 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, 16455 + ... + 41488.

It is an arithmetic number, because the mean of its divisors is an integer number (181335748).

Almost surely, 2^725272531 is an apocalyptic number.

725272531 is a deficient number, since it is larger than the sum of its proper divisors (70461).

725272531 is a wasteful number, since it uses less digits than its factorization.

725272531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70460.

The product of its digits is 29400, while the sum is 34.

The square root of 725272531 is about 26930.8843337905. The cubic root of 725272531 is about 898.4634402820.

The spelling of 725272531 in words is "seven hundred twenty-five million, two hundred seventy-two thousand, five hundred thirty-one".