315143402 has 12 divisors (see below), whose sum is σ = 549893250. Its totient is φ = 135061416.

The previous prime is 315143383. The next prime is 315143407. The reversal of 315143402 is 204341513.

It can be written as a sum of positive squares in only one way, i.e., 162843121 + 152300281 = 12761^2 + 12341^2 .

It is not an unprimeable number, because it can be changed into a prime (315143407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1607777 + ... + 1607972.

Almost surely, 2^315143402 is an apocalyptic number.

315143402 is a deficient number, since it is larger than the sum of its proper divisors (234749848).

315143402 is a wasteful number, since it uses less digits than its factorization.

315143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215765 (or 3215758 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 315143402 is about 17752.2787832999. The cubic root of 315143402 is about 680.5124467690.

Adding to 315143402 its reverse (204341513), we get a palindrome (519484915).

The spelling of 315143402 in words is "three hundred fifteen million, one hundred forty-three thousand, four hundred two".