2521139756 has 24 divisors (see below), whose sum is σ = 4626988800. Its totient is φ = 1199694672.

The previous prime is 2521139713. The next prime is 2521139771. The reversal of 2521139756 is 6579311252.

It is a super-2 number, since 2×2521139756² = 12712291338567479072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50546 + ... + 87161.

It is an arithmetic number, because the mean of its divisors is an integer number (192791200).

Almost surely, 2^2521139756 is an apocalyptic number.

It is an amenable number.

2521139756 is a deficient number, since it is larger than the sum of its proper divisors (2105849044).

2521139756 is a wasteful number, since it uses less digits than its factorization.

2521139756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137933 (or 137931 counting only the distinct ones).

The product of its digits is 113400, while the sum is 41.

The square root of 2521139756 is about 50210.9525502156. The cubic root of 2521139756 is about 1361.0235511259.

The spelling of 2521139756 in words is "two billion, five hundred twenty-one million, one hundred thirty-nine thousand, seven hundred fifty-six".