2516360921 has 2 divisors, whose sum is σ = 2516360922. Its totient is φ = 2516360920.

The previous prime is 2516360887. The next prime is 2516360983. The reversal of 2516360921 is 1290636152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1563095296 + 953265625 = 39536^2 + 30875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516360921 - 2⁶ = 2516360857 is a prime.

It is not a weakly prime, because it can be changed into another prime (2516360221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258180460 + 1258180461.

It is an arithmetic number, because the mean of its divisors is an integer number (1258180461).

Almost surely, 2^2516360921 is an apocalyptic number.

It is an amenable number.

2516360921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516360921 is an equidigital number, since it uses as much as digits as its factorization.

2516360921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2516360921 is about 50163.3424025951. The cubic root of 2516360921 is about 1360.1630645380.

The spelling of 2516360921 in words is "two billion, five hundred sixteen million, three hundred sixty thousand, nine hundred twenty-one".