2551230521 has 6 divisors (see below), whose sum is σ = 2967758010. Its totient is φ = 2186768976.

The previous prime is 2551230509. The next prime is 2551230533. The reversal of 2551230521 is 1250321552.

It is an interprime number because it is at equal distance from previous prime (2551230509) and next prime (2551230533).

It can be written as a sum of positive squares in only one way, i.e., 1733556496 + 817674025 = 41636^2 + 28595^2 .

It is not a de Polignac number, because 2551230521 - 2¹⁸ = 2550968377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2551230551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26032916 + ... + 26033013.

It is an arithmetic number, because the mean of its divisors is an integer number (494626335).

Almost surely, 2^2551230521 is an apocalyptic number.

It is an amenable number.

2551230521 is a deficient number, since it is larger than the sum of its proper divisors (416527489).

2551230521 is an equidigital number, since it uses as much as digits as its factorization.

2551230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52065943 (or 52065936 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2551230521 is about 50509.7071957460. The cubic root of 2551230521 is about 1366.4169288332.

The spelling of 2551230521 in words is "two billion, five hundred fifty-one million, two hundred thirty thousand, five hundred twenty-one".