2510521421 has 2 divisors, whose sum is σ = 2510521422. Its totient is φ = 2510521420.

The previous prime is 2510521399. The next prime is 2510521439. The reversal of 2510521421 is 1241250152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2348468521 + 162052900 = 48461^2 + 12730^2 .

It is a cyclic number.

It is not a de Polignac number, because 2510521421 - 2²⁶ = 2443412557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2510521441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255260710 + 1255260711.

It is an arithmetic number, because the mean of its divisors is an integer number (1255260711).

Almost surely, 2^2510521421 is an apocalyptic number.

It is an amenable number.

2510521421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2510521421 is an equidigital number, since it uses as much as digits as its factorization.

2510521421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2510521421 is about 50105.1037420341. The cubic root of 2510521421 is about 1359.1101122318.

Adding to 2510521421 its reverse (1241250152), we get a palindrome (3751771573).

The spelling of 2510521421 in words is "two billion, five hundred ten million, five hundred twenty-one thousand, four hundred twenty-one".