220631715055 has 4 divisors (see below), whose sum is σ = 264758058072. Its totient is φ = 176505372040.

The previous prime is 220631714993. The next prime is 220631715103. The reversal of 220631715055 is 550517136022.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 220631715055 - 2¹¹ = 220631713007 is a prime.

It is a super-2 number, since 2×220631715055² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 22063171501 + ... + 22063171510.

It is an arithmetic number, because the mean of its divisors is an integer number (66189514518).

Almost surely, 2^220631715055 is an apocalyptic number.

220631715055 is a deficient number, since it is larger than the sum of its proper divisors (44126343017).

220631715055 is an equidigital number, since it uses as much as digits as its factorization.

220631715055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44126343016.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 220631715055 in words is "two hundred twenty billion, six hundred thirty-one million, seven hundred fifteen thousand, fifty-five".