220617427 has 2 divisors, whose sum is σ = 220617428. Its totient is φ = 220617426.

The previous prime is 220617409. The next prime is 220617437. The reversal of 220617427 is 724716022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220617427 is a prime.

It is a super-2 number, since 2×220617427² = 97344098192200658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220617437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110308713 + 110308714.

It is an arithmetic number, because the mean of its divisors is an integer number (110308714).

Almost surely, 2^220617427 is an apocalyptic number.

220617427 is a deficient number, since it is larger than the sum of its proper divisors (1).

220617427 is an equidigital number, since it uses as much as digits as its factorization.

220617427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 220617427 is about 14853.1958513984. The cubic root of 220617427 is about 604.2452870898.

The spelling of 220617427 in words is "two hundred twenty million, six hundred seventeen thousand, four hundred twenty-seven".