1531713172 has 24 divisors (see below), whose sum is σ = 2972122272. Its totient is φ = 684818400.

The previous prime is 1531713163. The next prime is 1531713181. The reversal of 1531713172 is 2713171351.

It is an interprime number because it is at equal distance from previous prime (1531713163) and next prime (1531713181).

It is a super-2 number, since 2×1531713172² = 4692290482556603168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282658 + ... + 288025.

It is an arithmetic number, because the mean of its divisors is an integer number (123838428).

Almost surely, 2^1531713172 is an apocalyptic number.

It is an amenable number.

1531713172 is a deficient number, since it is larger than the sum of its proper divisors (1440409100).

1531713172 is a wasteful number, since it uses less digits than its factorization.

1531713172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570759 (or 570757 counting only the distinct ones).

The product of its digits is 4410, while the sum is 31.

The square root of 1531713172 is about 39137.1073535079. The cubic root of 1531713172 is about 1152.7252749045.

The spelling of 1531713172 in words is "one billion, five hundred thirty-one million, seven hundred thirteen thousand, one hundred seventy-two".