2521619993 has 2 divisors, whose sum is σ = 2521619994. Its totient is φ = 2521619992.

The previous prime is 2521619981. The next prime is 2521620037. The reversal of 2521619993 is 3999161252.

2521619993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2509208464 + 12411529 = 50092^2 + 3523^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521619993 - 2¹⁰ = 2521618969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521619923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260809996 + 1260809997.

It is an arithmetic number, because the mean of its divisors is an integer number (1260809997).

Almost surely, 2^2521619993 is an apocalyptic number.

It is an amenable number.

2521619993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521619993 is an equidigital number, since it uses as much as digits as its factorization.

2521619993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 47.

The square root of 2521619993 is about 50215.7345161853. The cubic root of 2521619993 is about 1361.1099634148.

The spelling of 2521619993 in words is "two billion, five hundred twenty-one million, six hundred nineteen thousand, nine hundred ninety-three".