315311446 has 4 divisors (see below), whose sum is σ = 472967172. Its totient is φ = 157655722.

The previous prime is 315311431. The next prime is 315311453. The reversal of 315311446 is 644113513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644113513 = 3469 ⋅185677.

It is a super-2 number, since 2×315311446² = 198842615957221832, 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 as a sum of consecutive naturals, namely, 78827860 + ... + 78827863.

It is an arithmetic number, because the mean of its divisors is an integer number (118241793).

Almost surely, 2^315311446 is an apocalyptic number.

315311446 is a deficient number, since it is larger than the sum of its proper divisors (157655726).

315311446 is a wasteful number, since it uses less digits than its factorization.

315311446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157655725.

The product of its digits is 4320, while the sum is 28.

The square root of 315311446 is about 17757.0111786866. The cubic root of 315311446 is about 680.6333818871.

Adding to 315311446 its reverse (644113513), we get a palindrome (959424959).

The spelling of 315311446 in words is "three hundred fifteen million, three hundred eleven thousand, four hundred forty-six".