221364210 has 16 divisors (see below), whose sum is σ = 531274176. Its totient is φ = 59030448.

The previous prime is 221364173. The next prime is 221364239. The reversal of 221364210 is 12463122.

It is a super-2 number, since 2×221364210² = 98004226937848200, which contains 22 as substring.

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, 3689374 + ... + 3689433.

It is an arithmetic number, because the mean of its divisors is an integer number (33204636).

Almost surely, 2^221364210 is an apocalyptic number.

221364210 is an abundant number, since it is smaller than the sum of its proper divisors (309909966).

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

221364210 is a wasteful number, since it uses less digits than its factorization.

221364210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378817.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 221364210 is about 14878.3134124806. The cubic root of 221364210 is about 604.9263029781.

The spelling of 221364210 in words is "two hundred twenty-one million, three hundred sixty-four thousand, two hundred ten".