315216412 has 36 divisors (see below), whose sum is σ = 643465704. Its totient is φ = 134719200.

The previous prime is 315216379. The next prime is 315216491. The reversal of 315216412 is 214612513.

It is a happy number.

It is a super-2 number, since 2×315216412² = 198722772788307488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75787 + ... + 79837.

Almost surely, 2^315216412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315216412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321732852).

315216412 is an abundant number, since it is smaller than the sum of its proper divisors (328249292).

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

315216412 is a wasteful number, since it uses less digits than its factorization.

315216412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466 (or 4457 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 315216412 is about 17754.3350199325. The cubic root of 315216412 is about 680.5649946748.

Adding to 315216412 its reverse (214612513), we get a palindrome (529828925).

The spelling of 315216412 in words is "three hundred fifteen million, two hundred sixteen thousand, four hundred twelve".