2288407921 has 2 divisors, whose sum is σ = 2288407922. Its totient is φ = 2288407920.

The previous prime is 2288407909. The next prime is 2288407939. The reversal of 2288407921 is 1297048822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1262807296 + 1025600625 = 35536^2 + 32025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288407921 - 2¹⁵ = 2288375153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2288407991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144203960 + 1144203961.

It is an arithmetic number, because the mean of its divisors is an integer number (1144203961).

Almost surely, 2^2288407921 is an apocalyptic number.

It is an amenable number.

2288407921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2288407921 is an equidigital number, since it uses as much as digits as its factorization.

2288407921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 2288407921 is about 47837.3067908301. The cubic root of 2288407921 is about 1317.7847602951.

The spelling of 2288407921 in words is "two billion, two hundred eighty-eight million, four hundred seven thousand, nine hundred twenty-one".