220166431 has 2 divisors, whose sum is σ = 220166432. Its totient is φ = 220166430.

The previous prime is 220166413. The next prime is 220166447. The reversal of 220166431 is 134661022.

Together with previous prime (220166413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220166431 - 2²⁷ = 85948703 is a prime.

It is a super-2 number, since 2×220166431² = 96946514678555522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220166396 and 220166405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220166411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110083215 + 110083216.

It is an arithmetic number, because the mean of its divisors is an integer number (110083216).

Almost surely, 2^220166431 is an apocalyptic number.

220166431 is a deficient number, since it is larger than the sum of its proper divisors (1).

220166431 is an equidigital number, since it uses as much as digits as its factorization.

220166431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 220166431 is about 14838.0063013870. The cubic root of 220166431 is about 603.8332644673.

The spelling of 220166431 in words is "two hundred twenty million, one hundred sixty-six thousand, four hundred thirty-one".