220997265 has 32 divisors (see below), whose sum is σ = 375736320. Its totient is φ = 110602944.

The previous prime is 220997251. The next prime is 220997269. The reversal of 220997265 is 562799022.

It is not a de Polignac number, because 220997265 - 2⁶ = 220997201 is a prime.

It is a super-2 number, since 2×220997265² = 97679582274960450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220997269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26872 + ... + 34118.

It is an arithmetic number, because the mean of its divisors is an integer number (11741760).

Almost surely, 2^220997265 is an apocalyptic number.

It is an amenable number.

220997265 is a deficient number, since it is larger than the sum of its proper divisors (154739055).

220997265 is a wasteful number, since it uses less digits than its factorization.

220997265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 220997265 is about 14865.9767590293. The cubic root of 220997265 is about 604.5918655252.

The spelling of 220997265 in words is "two hundred twenty million, nine hundred ninety-seven thousand, two hundred sixty-five".