213440331432 has 32 divisors (see below), whose sum is σ = 534236875200. Its totient is φ = 71061970944.

The previous prime is 213440331431. The next prime is 213440331451. The reversal of 213440331432 is 234133044312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 213440331432.

It is not an unprimeable number, because it can be changed into a prime (213440331431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5279833 + ... + 5320104.

It is an arithmetic number, because the mean of its divisors is an integer number (16694902350).

Almost surely, 2^213440331432 is an apocalyptic number.

It is an amenable number.

213440331432 is an abundant number, since it is smaller than the sum of its proper divisors (320796543768).

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

213440331432 is a wasteful number, since it uses less digits than its factorization.

213440331432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600785 (or 10600781 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 213440331432 its reverse (234133044312), we get a palindrome (447573375744).

The spelling of 213440331432 in words is "two hundred thirteen billion, four hundred forty million, three hundred thirty-one thousand, four hundred thirty-two".