2521042399 has 16 divisors (see below), whose sum is σ = 2647481760. Its totient is φ = 2397911040.

The previous prime is 2521042393. The next prime is 2521042409. The reversal of 2521042399 is 9932401252.

2521042399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2521042399 - 2⁵ = 2521042367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521042393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1333647 + ... + 1335535.

It is an arithmetic number, because the mean of its divisors is an integer number (165467610).

Almost surely, 2^2521042399 is an apocalyptic number.

2521042399 is a deficient number, since it is larger than the sum of its proper divisors (126439361).

2521042399 is a wasteful number, since it uses less digits than its factorization.

2521042399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2521042399 is about 50209.9830611403. The cubic root of 2521042399 is about 1361.0060316852.

The spelling of 2521042399 in words is "two billion, five hundred twenty-one million, forty-two thousand, three hundred ninety-nine".