221360856 has 24 divisors (see below), whose sum is σ = 553584420. Its totient is φ = 73762656.

The previous prime is 221360837. The next prime is 221360879. The reversal of 221360856 is 658063122.

221360856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71370 + ... + 74406.

Almost surely, 2^221360856 is an apocalyptic number.

It is an amenable number.

221360856 is an abundant number, since it is smaller than the sum of its proper divisors (332223564).

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

221360856 is an frugal number, since it uses more digits than its factorization.

221360856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6083 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 221360856 is about 14878.2006976650. The cubic root of 221360856 is about 604.9232477822.

The spelling of 221360856 in words is "two hundred twenty-one million, three hundred sixty thousand, eight hundred fifty-six".