315880442 has 4 divisors (see below), whose sum is σ = 473820666. Its totient is φ = 157940220.

The previous prime is 315880393. The next prime is 315880457. The reversal of 315880442 is 244088513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244088513 = 31 ⋅7873823.

It can be written as a sum of positive squares in only one way, i.e., 207907561 + 107972881 = 14419^2 + 10391^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78970109 + ... + 78970112.

Almost surely, 2^315880442 is an apocalyptic number.

315880442 is a deficient number, since it is larger than the sum of its proper divisors (157940224).

315880442 is a wasteful number, since it uses less digits than its factorization.

315880442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157940223.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 315880442 is about 17773.0256850093. The cubic root of 315880442 is about 681.0425487132.

The spelling of 315880442 in words is "three hundred fifteen million, eight hundred eighty thousand, four hundred forty-two".