4481572021 has 2 divisors, whose sum is σ = 4481572022. Its totient is φ = 4481572020.

The previous prime is 4481571959. The next prime is 4481572027. The reversal of 4481572021 is 1202751844.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2982798225 + 1498773796 = 54615^2 + 38714^2 .

It is a cyclic number.

It is not a de Polignac number, because 4481572021 - 2²⁵ = 4448017589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4481572027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2240786010 + 2240786011.

It is an arithmetic number, because the mean of its divisors is an integer number (2240786011).

Almost surely, 2^4481572021 is an apocalyptic number.

It is an amenable number.

4481572021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4481572021 is an equidigital number, since it uses as much as digits as its factorization.

4481572021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 4481572021 is about 66944.5443706954. The cubic root of 4481572021 is about 1648.7069172268.

The spelling of 4481572021 in words is "four billion, four hundred eighty-one million, five hundred seventy-two thousand, twenty-one".