426163221 has 32 divisors (see below), whose sum is σ = 695485440. Its totient is φ = 255754800.

The previous prime is 426163219. The next prime is 426163237. The reversal of 426163221 is 122361624.

426163221 is a `hidden beast` number, since 4 + 2 + 6 + 1 + 632 + 21 = 666.

It is not a de Polignac number, because 426163221 - 2¹ = 426163219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426163261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23626 + ... + 37556.

It is an arithmetic number, because the mean of its divisors is an integer number (21733920).

Almost surely, 2^426163221 is an apocalyptic number.

It is an amenable number.

426163221 is a deficient number, since it is larger than the sum of its proper divisors (269322219).

426163221 is a wasteful number, since it uses less digits than its factorization.

426163221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14054 (or 14048 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 426163221 is about 20643.7211035220. The cubic root of 426163221 is about 752.5326062478.

It can be divided in two parts, 4 and 26163221, that added together give a square (26163225 = 5115²).

The spelling of 426163221 in words is "four hundred twenty-six million, one hundred sixty-three thousand, two hundred twenty-one".