221364956 has 12 divisors (see below), whose sum is σ = 410176368. Its totient is φ = 104171712.

The previous prime is 221364947. The next prime is 221364959. The reversal of 221364956 is 659463122.

221364956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221364959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627616 + ... + 1627751.

It is an arithmetic number, because the mean of its divisors is an integer number (34181364).

Almost surely, 2^221364956 is an apocalyptic number.

It is an amenable number.

221364956 is a deficient number, since it is larger than the sum of its proper divisors (188811412).

221364956 is a wasteful number, since it uses less digits than its factorization.

221364956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255388 (or 3255386 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 221364956 is about 14878.3384825054. The cubic root of 221364956 is about 604.9269825136.

The spelling of 221364956 in words is "two hundred twenty-one million, three hundred sixty-four thousand, nine hundred fifty-six".