4551902921 has 2 divisors, whose sum is σ = 4551902922. Its totient is φ = 4551902920.

The previous prime is 4551902897. The next prime is 4551902947. The reversal of 4551902921 is 1292091554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4545456400 + 6446521 = 67420^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 4551902921 - 2⁶ = 4551902857 is a prime.

It is not a weakly prime, because it can be changed into another prime (4551982921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2275951460 + 2275951461.

It is an arithmetic number, because the mean of its divisors is an integer number (2275951461).

Almost surely, 2^4551902921 is an apocalyptic number.

It is an amenable number.

4551902921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4551902921 is an equidigital number, since it uses as much as digits as its factorization.

4551902921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 4551902921 is about 67467.7917305732. The cubic root of 4551902921 is about 1657.2867711997.

The spelling of 4551902921 in words is "four billion, five hundred fifty-one million, nine hundred two thousand, nine hundred twenty-one".