213981975684 has 36 divisors (see below), whose sum is σ = 540936942000. Its totient is φ = 71322306480.

The previous prime is 213981975661. The next prime is 213981975707. The reversal of 213981975684 is 486579189312.

213981975684 is a `hidden beast` number, since 2 + 1 + 398 + 197 + 56 + 8 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (213981975661) and next prime (213981975707).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328567 + ... + 732065.

Almost surely, 2^213981975684 is an apocalyptic number.

It is an amenable number.

213981975684 is an abundant number, since it is smaller than the sum of its proper divisors (326954966316).

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

213981975684 is a wasteful number, since it uses less digits than its factorization.

213981975684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418240 (or 418235 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 213981975684 in words is "two hundred thirteen billion, nine hundred eighty-one million, nine hundred seventy-five thousand, six hundred eighty-four".