472201921 has 2 divisors, whose sum is σ = 472201922. Its totient is φ = 472201920.

The previous prime is 472201907. The next prime is 472201969. The reversal of 472201921 is 129102274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469328896 + 2873025 = 21664^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 472201921 - 2⁹ = 472201409 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 472201921.

It is not a weakly prime, because it can be changed into another prime (472201991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236100960 + 236100961.

It is an arithmetic number, because the mean of its divisors is an integer number (236100961).

Almost surely, 2^472201921 is an apocalyptic number.

It is an amenable number.

472201921 is a deficient number, since it is larger than the sum of its proper divisors (1).

472201921 is an equidigital number, since it uses as much as digits as its factorization.

472201921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 472201921 is about 21730.2075691881. The cubic root of 472201921 is about 778.7102952737.

It can be divided in two parts, 47220 and 1921, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 472201921 in words is "four hundred seventy-two million, two hundred one thousand, nine hundred twenty-one".