220982731 has 8 divisors (see below), whose sum is σ = 222290640. Its totient is φ = 219679392.

The previous prime is 220982701. The next prime is 220982737. The reversal of 220982731 is 137289022.

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

It is a cyclic number.

It is not a de Polignac number, because 220982731 - 2⁹ = 220982219 is a prime.

It is a super-2 number, since 2×220982731² = 97666734800436722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220982737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144336 + ... + 145858.

It is an arithmetic number, because the mean of its divisors is an integer number (27786330).

Almost surely, 2^220982731 is an apocalyptic number.

220982731 is a deficient number, since it is larger than the sum of its proper divisors (1307909).

220982731 is a wasteful number, since it uses less digits than its factorization.

220982731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 220982731 is about 14865.4879166477. The cubic root of 220982731 is about 604.5786114686.

The spelling of 220982731 in words is "two hundred twenty million, nine hundred eighty-two thousand, seven hundred thirty-one".