2521249138 has 8 divisors (see below), whose sum is σ = 3824366940. Its totient is φ = 1246460160.

The previous prime is 2521249111. The next prime is 2521249139. The reversal of 2521249138 is 8319421252.

2521249138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2502300529 + 18948609 = 50023^2 + 4353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2521249097 and 2521249106.

It is not an unprimeable number, because it can be changed into a prime (2521249139) 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, 7081983 + ... + 7082338.

Almost surely, 2^2521249138 is an apocalyptic number.

2521249138 is a deficient number, since it is larger than the sum of its proper divisors (1303117802).

2521249138 is a wasteful number, since it uses less digits than its factorization.

2521249138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14164412.

The product of its digits is 34560, while the sum is 37.

The square root of 2521249138 is about 50212.0417629078. The cubic root of 2521249138 is about 1361.0432339334.

The spelling of 2521249138 in words is "two billion, five hundred twenty-one million, two hundred forty-nine thousand, one hundred thirty-eight".