213398979508 has 24 divisors (see below), whose sum is σ = 438736364640. Its totient is φ = 89538033120.

The previous prime is 213398979473. The next prime is 213398979557. The reversal of 213398979508 is 805979893312.

It is a self number, because there is not a number n which added to its sum of digits gives 213398979508.

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, 186536998 + ... + 186538141.

It is an arithmetic number, because the mean of its divisors is an integer number (18280681860).

Almost surely, 2^213398979508 is an apocalyptic number.

It is an amenable number.

213398979508 is an abundant number, since it is smaller than the sum of its proper divisors (225337385132).

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

213398979508 is a wasteful number, since it uses less digits than its factorization.

213398979508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373075167 (or 373075165 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 64.

The spelling of 213398979508 in words is "two hundred thirteen billion, three hundred ninety-eight million, nine hundred seventy-nine thousand, five hundred eight".