731157172 has 12 divisors (see below), whose sum is σ = 1281893956. Its totient is φ = 364901760.

The previous prime is 731157169. The next prime is 731157173. The reversal of 731157172 is 271751137.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 451732516 + 279424656 = 21254^2 + 16716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731157173) 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, 166773 + ... + 171100.

Almost surely, 2^731157172 is an apocalyptic number.

It is an amenable number.

731157172 is a deficient number, since it is larger than the sum of its proper divisors (550736784).

731157172 is a wasteful number, since it uses less digits than its factorization.

731157172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338418 (or 338416 counting only the distinct ones).

The product of its digits is 10290, while the sum is 34.

The square root of 731157172 is about 27039.9181211778. The cubic root of 731157172 is about 900.8868509219.

The spelling of 731157172 in words is "seven hundred thirty-one million, one hundred fifty-seven thousand, one hundred seventy-two".