427221651 has 16 divisors (see below), whose sum is σ = 577704960. Its totient is φ = 280787520.

The previous prime is 427221601. The next prime is 427221653. The reversal of 427221651 is 156122724.

It is not a de Polignac number, because 427221651 - 2⁹ = 427221139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427221653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281986 + ... + 283496.

It is an arithmetic number, because the mean of its divisors is an integer number (36106560).

Almost surely, 2^427221651 is an apocalyptic number.

427221651 is a deficient number, since it is larger than the sum of its proper divisors (150483309).

427221651 is a wasteful number, since it uses less digits than its factorization.

427221651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786.

The product of its digits is 6720, while the sum is 30.

The square root of 427221651 is about 20669.3408458035. The cubic root of 427221651 is about 753.1550943387.

The spelling of 427221651 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred fifty-one".