220926731 has 2 divisors, whose sum is σ = 220926732. Its totient is φ = 220926730.

The previous prime is 220926703. The next prime is 220926749. The reversal of 220926731 is 137629022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220926731 is a prime.

It is a super-2 number, since 2×220926731² = 97617240940692722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220926701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110463365 + 110463366.

It is an arithmetic number, because the mean of its divisors is an integer number (110463366).

Almost surely, 2^220926731 is an apocalyptic number.

220926731 is a deficient number, since it is larger than the sum of its proper divisors (1).

220926731 is an equidigital number, since it uses as much as digits as its factorization.

220926731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 220926731 is about 14863.6042398874. The cubic root of 220926731 is about 604.5275377001.

The spelling of 220926731 in words is "two hundred twenty million, nine hundred twenty-six thousand, seven hundred thirty-one".