220431919 has 2 divisors, whose sum is σ = 220431920. Its totient is φ = 220431918.

The previous prime is 220431881. The next prime is 220431961. The reversal of 220431919 is 919134022.

220431919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220431919 - 2⁷ = 220431791 is a prime.

It is a super-2 number, since 2×220431919² = 97180461828045122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220431619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110215959 + 110215960.

It is an arithmetic number, because the mean of its divisors is an integer number (110215960).

Almost surely, 2^220431919 is an apocalyptic number.

220431919 is a deficient number, since it is larger than the sum of its proper divisors (1).

220431919 is an equidigital number, since it uses as much as digits as its factorization.

220431919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 220431919 is about 14846.9498214280. The cubic root of 220431919 is about 604.0758780381.

The spelling of 220431919 in words is "two hundred twenty million, four hundred thirty-one thousand, nine hundred nineteen".