220814731 has 2 divisors, whose sum is σ = 220814732. Its totient is φ = 220814730.

The previous prime is 220814687. The next prime is 220814809. The reversal of 220814731 is 137418022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220814731 - 2⁷ = 220814603 is a prime.

It is a super-2 number, since 2×220814731² = 97518290853204722, 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 220814731.

It is not a weakly prime, because it can be changed into another prime (220814431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110407365 + 110407366.

It is an arithmetic number, because the mean of its divisors is an integer number (110407366).

Almost surely, 2^220814731 is an apocalyptic number.

220814731 is a deficient number, since it is larger than the sum of its proper divisors (1).

220814731 is an equidigital number, since it uses as much as digits as its factorization.

220814731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 220814731 is about 14859.8361700256. The cubic root of 220814731 is about 604.4253642651.

The spelling of 220814731 in words is "two hundred twenty million, eight hundred fourteen thousand, seven hundred thirty-one".