2521230081 has 4 divisors (see below), whose sum is σ = 3361640112. Its totient is φ = 1680820052.

The previous prime is 2521230037. The next prime is 2521230083. The reversal of 2521230081 is 1800321252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521230081 - 2¹⁵ = 2521197313 is a prime.

It is a super-2 number, since 2×2521230081² = 12713202242678533122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2521230083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420205011 + ... + 420205016.

It is an arithmetic number, because the mean of its divisors is an integer number (840410028).

Almost surely, 2^2521230081 is an apocalyptic number.

It is an amenable number.

2521230081 is a deficient number, since it is larger than the sum of its proper divisors (840410031).

2521230081 is an equidigital number, since it uses as much as digits as its factorization.

2521230081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840410030.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2521230081 is about 50211.8519973123. The cubic root of 2521230081 is about 1361.0398047514.

The spelling of 2521230081 in words is "two billion, five hundred twenty-one million, two hundred thirty thousand, eighty-one".