221455032 has 32 divisors (see below), whose sum is σ = 582777600. Its totient is φ = 69933024.

The previous prime is 221455021. The next prime is 221455037. The reversal of 221455032 is 230554122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 221454993 and 221455011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221455037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242368 + ... + 243279.

It is an arithmetic number, because the mean of its divisors is an integer number (18211800).

Almost surely, 2^221455032 is an apocalyptic number.

It is an amenable number.

221455032 is an abundant number, since it is smaller than the sum of its proper divisors (361322568).

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

221455032 is a wasteful number, since it uses less digits than its factorization.

221455032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485675 (or 485671 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 221455032 is about 14881.3652599484. The cubic root of 221455032 is about 605.0090220179.

The spelling of 221455032 in words is "two hundred twenty-one million, four hundred fifty-five thousand, thirty-two".