315222994 has 4 divisors (see below), whose sum is σ = 472834494. Its totient is φ = 157611496.

The previous prime is 315222989. The next prime is 315222997. The reversal of 315222994 is 499222513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 227557225 + 87665769 = 15085^2 + 9363^2 .

It is not an unprimeable number, because it can be changed into a prime (315222997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78805747 + ... + 78805750.

Almost surely, 2^315222994 is an apocalyptic number.

315222994 is a deficient number, since it is larger than the sum of its proper divisors (157611500).

315222994 is a wasteful number, since it uses less digits than its factorization.

315222994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157611499.

The product of its digits is 38880, while the sum is 37.

The square root of 315222994 is about 17754.5203821449. The cubic root of 315222994 is about 680.5697315767.

The spelling of 315222994 in words is "three hundred fifteen million, two hundred twenty-two thousand, nine hundred ninety-four".