315143172 has 18 divisors (see below), whose sum is σ = 796611998. Its totient is φ = 105047712.

The previous prime is 315143149. The next prime is 315143189. The reversal of 315143172 is 271341513.

It can be written as a sum of positive squares in only one way, i.e., 309267396 + 5875776 = 17586^2 + 2424^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4376953 + ... + 4377024.

Almost surely, 2^315143172 is an apocalyptic number.

It is an amenable number.

315143172 is an abundant number, since it is smaller than the sum of its proper divisors (481468826).

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

315143172 is a wasteful number, since it uses less digits than its factorization.

315143172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753987 (or 8753982 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 315143172 is about 17752.2723052571. The cubic root of 315143172 is about 680.5122812170.

Adding to 315143172 its reverse (271341513), we get a palindrome (586484685).

The spelling of 315143172 in words is "three hundred fifteen million, one hundred forty-three thousand, one hundred seventy-two".