213431342056 has 16 divisors (see below), whose sum is σ = 404069047200. Its totient is φ = 105679596144.

The previous prime is 213431342023. The next prime is 213431342057. The reversal of 213431342056 is 650243134312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213431342057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129508486 + ... + 129510133.

It is an arithmetic number, because the mean of its divisors is an integer number (25254315450).

Almost surely, 2^213431342056 is an apocalyptic number.

It is an amenable number.

213431342056 is a deficient number, since it is larger than the sum of its proper divisors (190637705144).

213431342056 is a wasteful number, since it uses less digits than its factorization.

213431342056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259018728 (or 259018724 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 213431342056 its reverse (650243134312), we get a palindrome (863674476368).

The spelling of 213431342056 in words is "two hundred thirteen billion, four hundred thirty-one million, three hundred forty-two thousand, fifty-six".