220968765 has 24 divisors (see below), whose sum is σ = 403172640. Its totient is φ = 111646944.

The previous prime is 220968757. The next prime is 220968799. The reversal of 220968765 is 567869022.

It is not a de Polignac number, because 220968765 - 2³ = 220968757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 220968765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128367 + ... + 130076.

It is an arithmetic number, because the mean of its divisors is an integer number (16798860).

Almost surely, 2^220968765 is an apocalyptic number.

It is an amenable number.

220968765 is a deficient number, since it is larger than the sum of its proper divisors (182203875).

220968765 is a wasteful number, since it uses less digits than its factorization.

220968765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258473 (or 258470 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 220968765 is about 14865.0181634601. The cubic root of 220968765 is about 604.5658748432.

The spelling of 220968765 in words is "two hundred twenty million, nine hundred sixty-eight thousand, seven hundred sixty-five".