472201721 has 4 divisors (see below), whose sum is σ = 480205200. Its totient is φ = 464198244.

The previous prime is 472201649. The next prime is 472201747. The reversal of 472201721 is 127102274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472201721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472201321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001651 + ... + 4001768.

It is an arithmetic number, because the mean of its divisors is an integer number (120051300).

Almost surely, 2^472201721 is an apocalyptic number.

It is an amenable number.

472201721 is a deficient number, since it is larger than the sum of its proper divisors (8003479).

472201721 is an equidigital number, since it uses as much as digits as its factorization.

472201721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003478.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 472201721 is about 21730.2029672988. The cubic root of 472201721 is about 778.7101853334.

Adding to 472201721 its reverse (127102274), we get a palindrome (599303995).

The spelling of 472201721 in words is "four hundred seventy-two million, two hundred one thousand, seven hundred twenty-one".