427221556 has 6 divisors (see below), whose sum is σ = 747637730. Its totient is φ = 213610776.

The previous prime is 427221539. The next prime is 427221581. The reversal of 427221556 is 655122724.

It can be written as a sum of positive squares in only one way, i.e., 265168656 + 162052900 = 16284^2 + 12730^2 .

It is a super-2 number, since 2×427221556² = 365036515822122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53402691 + ... + 53402698.

Almost surely, 2^427221556 is an apocalyptic number.

It is an amenable number.

427221556 is a deficient number, since it is larger than the sum of its proper divisors (320416174).

427221556 is a wasteful number, since it uses less digits than its factorization.

427221556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106805393 (or 106805391 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 427221556 is about 20669.3385477136. The cubic root of 427221556 is about 753.1550385131.

The spelling of 427221556 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, five hundred fifty-six".