472647221 has 8 divisors (see below), whose sum is σ = 487431000. Its totient is φ = 458018560.

The previous prime is 472647169. The next prime is 472647233. The reversal of 472647221 is 122746274.

It can be written as a sum of positive squares in 4 ways, for example, as 91968100 + 380679121 = 9590^2 + 19511^2 .

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 472647221 - 2¹⁸ = 472385077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472677221) 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, 32576 + ... + 44793.

It is an arithmetic number, because the mean of its divisors is an integer number (60928875).

Almost surely, 2^472647221 is an apocalyptic number.

472647221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

472647221 is a deficient number, since it is larger than the sum of its proper divisors (14783779).

472647221 is a wasteful number, since it uses less digits than its factorization.

472647221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77559.

The product of its digits is 37632, while the sum is 35.

The square root of 472647221 is about 21740.4512602660. The cubic root of 472647221 is about 778.9550004409.

The spelling of 472647221 in words is "four hundred seventy-two million, six hundred forty-seven thousand, two hundred twenty-one".