213911656392 has 128 divisors (see below), whose sum is σ = 629826336000. Its totient is φ = 60512256000.

The previous prime is 213911656381. The next prime is 213911656429. The reversal of 213911656392 is 293656119312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 702792 + ... + 960072.

It is an arithmetic number, because the mean of its divisors is an integer number (4920518250).

Almost surely, 2^213911656392 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 213911656392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314913168000).

213911656392 is an abundant number, since it is smaller than the sum of its proper divisors (415914679608).

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

213911656392 is a wasteful number, since it uses less digits than its factorization.

213911656392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257412 (or 257394 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The spelling of 213911656392 in words is "two hundred thirteen billion, nine hundred eleven million, six hundred fifty-six thousand, three hundred ninety-two".