2138624551 has 8 divisors (see below), whose sum is σ = 2494023200. Its totient is φ = 1833106464.

The previous prime is 2138624549. The next prime is 2138624567. The reversal of 2138624551 is 1554268312.

It is not a de Polignac number, because 2138624551 - 2¹ = 2138624549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138624551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138628551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117186 + ... + 3117871.

It is an arithmetic number, because the mean of its divisors is an integer number (311752900).

Almost surely, 2^2138624551 is an apocalyptic number.

2138624551 is a deficient number, since it is larger than the sum of its proper divisors (355398649).

2138624551 is an frugal number, since it uses more digits than its factorization.

2138624551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235078 (or 6235064 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 2138624551 is about 46245.2651738532. The cubic root of 2138624551 is about 1288.3825954612.

The spelling of 2138624551 in words is "two billion, one hundred thirty-eight million, six hundred twenty-four thousand, five hundred fifty-one".