472894221 has 8 divisors (see below), whose sum is σ = 636768864. Its totient is φ = 312141200.

The previous prime is 472894207. The next prime is 472894223. The reversal of 472894221 is 122498274.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 472894221 - 2⁶ = 472894157 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 472894221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472894223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780051 + ... + 780656.

It is an arithmetic number, because the mean of its divisors is an integer number (79596108).

Almost surely, 2^472894221 is an apocalyptic number.

It is an amenable number.

472894221 is a deficient number, since it is larger than the sum of its proper divisors (163874643).

472894221 is a wasteful number, since it uses less digits than its factorization.

472894221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560811.

The product of its digits is 64512, while the sum is 39.

The square root of 472894221 is about 21746.1311731535. The cubic root of 472894221 is about 779.0906677848.

The spelling of 472894221 in words is "four hundred seventy-two million, eight hundred ninety-four thousand, two hundred twenty-one".