220733621 has 8 divisors (see below), whose sum is σ = 232858080. Its totient is φ = 208659888.

The previous prime is 220733549. The next prime is 220733629. The reversal of 220733621 is 126337022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220733621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220733629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3566 + ... + 21311.

It is an arithmetic number, because the mean of its divisors is an integer number (29107260).

Almost surely, 2^220733621 is an apocalyptic number.

It is an amenable number.

220733621 is a deficient number, since it is larger than the sum of its proper divisors (12124459).

220733621 is a wasteful number, since it uses less digits than its factorization.

220733621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25363.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 220733621 is about 14857.1067506429. The cubic root of 220733621 is about 604.3513490565.

The spelling of 220733621 in words is "two hundred twenty million, seven hundred thirty-three thousand, six hundred twenty-one".