220958391 has 16 divisors (see below), whose sum is σ = 310432640. Its totient is φ = 139410720.

The previous prime is 220958383. The next prime is 220958411. The reversal of 220958391 is 193859022.

It is not a de Polignac number, because 220958391 - 2³ = 220958383 is a prime.

It is a super-2 number, since 2×220958391² = 97645221106617762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220958321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105036 + ... + 107118.

It is an arithmetic number, because the mean of its divisors is an integer number (19402040).

Almost surely, 2^220958391 is an apocalyptic number.

220958391 is a deficient number, since it is larger than the sum of its proper divisors (89474249).

220958391 is a wasteful number, since it uses less digits than its factorization.

220958391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 220958391 is about 14864.6692193267. The cubic root of 220958391 is about 604.5564136802.

The spelling of 220958391 in words is "two hundred twenty million, nine hundred fifty-eight thousand, three hundred ninety-one".