221309520936 has 64 divisors (see below), whose sum is σ = 637139796480. Its totient is φ = 62748603840.

The previous prime is 221309520923. The next prime is 221309520961. The reversal of 221309520936 is 639025903122.

221309520936 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5005926 + ... + 5049941.

It is an arithmetic number, because the mean of its divisors is an integer number (9955309320).

Almost surely, 2^221309520936 is an apocalyptic number.

It is an amenable number.

221309520936 is an abundant number, since it is smaller than the sum of its proper divisors (415830275544).

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

221309520936 is a wasteful number, since it uses less digits than its factorization.

221309520936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056014 (or 10056010 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 221309520936 in words is "two hundred twenty-one billion, three hundred nine million, five hundred twenty thousand, nine hundred thirty-six".