725312172 has 36 divisors (see below), whose sum is σ = 1832598600. Its totient is φ = 223172352.

The previous prime is 725312149. The next prime is 725312197. The reversal of 725312172 is 271213527.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176797 + ... + 180852.

Almost surely, 2^725312172 is an apocalyptic number.

It is an amenable number.

725312172 is an abundant number, since it is smaller than the sum of its proper divisors (1107286428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725312172 is a wasteful number, since it uses less digits than its factorization.

725312172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357682 (or 357667 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 725312172 is about 26931.6203003087. The cubic root of 725312172 is about 898.4798089981.

Adding to 725312172 its reverse (271213527), we get a palindrome (996525699).

The spelling of 725312172 in words is "seven hundred twenty-five million, three hundred twelve thousand, one hundred seventy-two".