220625731 has 2 divisors, whose sum is σ = 220625732. Its totient is φ = 220625730.

The previous prime is 220625687. The next prime is 220625747. The reversal of 220625731 is 137526022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220625731 - 2²⁵ = 187071299 is a prime.

It is a super-2 number, since 2×220625731² = 97351426358568722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220625731.

It is not a weakly prime, because it can be changed into another prime (220625771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110312865 + 110312866.

It is an arithmetic number, because the mean of its divisors is an integer number (110312866).

Almost surely, 2^220625731 is an apocalyptic number.

220625731 is a deficient number, since it is larger than the sum of its proper divisors (1).

220625731 is an equidigital number, since it uses as much as digits as its factorization.

220625731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 220625731 is about 14853.4753845691. The cubic root of 220625731 is about 604.2528682224.

The spelling of 220625731 in words is "two hundred twenty million, six hundred twenty-five thousand, seven hundred thirty-one".