2551752621 has 24 divisors (see below), whose sum is σ = 4023268704. Its totient is φ = 1545622560.

The previous prime is 2551752617. The next prime is 2551752653. The reversal of 2551752621 is 1262571552.

2551752621 is a `hidden beast` number, since 25 + 5 + 1 + 7 + 5 + 2 + 621 = 666.

It is not a de Polignac number, because 2551752621 - 2² = 2551752617 is a prime.

It is a super-2 number, since 2×2551752621² = 13022882877560739282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551752121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191250 + ... + 204156.

It is an arithmetic number, because the mean of its divisors is an integer number (167636196).

Almost surely, 2^2551752621 is an apocalyptic number.

It is an amenable number.

2551752621 is a deficient number, since it is larger than the sum of its proper divisors (1471516083).

2551752621 is a wasteful number, since it uses less digits than its factorization.

2551752621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14921 (or 14918 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 2551752621 is about 50514.8752448227. The cubic root of 2551752621 is about 1366.5101332187.

The spelling of 2551752621 in words is "two billion, five hundred fifty-one million, seven hundred fifty-two thousand, six hundred twenty-one".