213431316 has 24 divisors (see below), whose sum is σ = 569150400. Its totient is φ = 60980352.

The previous prime is 213431291. The next prime is 213431321. The reversal of 213431316 is 613134312.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270341 + ... + 1270508.

It is an arithmetic number, because the mean of its divisors is an integer number (23714600).

Almost surely, 2^213431316 is an apocalyptic number.

It is an amenable number.

213431316 is an abundant number, since it is smaller than the sum of its proper divisors (355719084).

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

213431316 is a wasteful number, since it uses less digits than its factorization.

213431316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540863 (or 2540861 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 213431316 is about 14609.2886890499. The cubic root of 213431316 is about 597.6120980367.

Adding to 213431316 its reverse (613134312), we get a palindrome (826565628).

The spelling of 213431316 in words is "two hundred thirteen million, four hundred thirty-one thousand, three hundred sixteen".