220540775 has 36 divisors (see below), whose sum is σ = 338473872. Its totient is φ = 139576320.

The previous prime is 220540759. The next prime is 220540781. The reversal of 220540775 is 577045022.

It is not a de Polignac number, because 220540775 - 2⁴ = 220540759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25847 + ... + 33303.

It is an arithmetic number, because the mean of its divisors is an integer number (9402052).

Almost surely, 2^220540775 is an apocalyptic number.

220540775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

220540775 is a deficient number, since it is larger than the sum of its proper divisors (117933097).

220540775 is a wasteful number, since it uses less digits than its factorization.

220540775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500 (or 7482 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 220540775 is about 14850.6153071177. The cubic root of 220540775 is about 604.1752987008.

Adding to 220540775 its reverse (577045022), we get a palindrome (797585797).

The spelling of 220540775 in words is "two hundred twenty million, five hundred forty thousand, seven hundred seventy-five".