51123252005 has 16 divisors (see below), whose sum is σ = 70171311744. Its totient is φ = 35026232640.

The previous prime is 51123251999. The next prime is 51123252007. The reversal of 51123252005 is 50025232115.

It is not a de Polignac number, because 51123252005 - 2¹⁶ = 51123186469 is a prime.

It is a super-2 number, since 2×51123252005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123252007) 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, 577067 + ... + 659736.

It is an arithmetic number, because the mean of its divisors is an integer number (4385706984).

Almost surely, 2^51123252005 is an apocalyptic number.

It is an amenable number.

51123252005 is a deficient number, since it is larger than the sum of its proper divisors (19048059739).

51123252005 is a wasteful number, since it uses less digits than its factorization.

51123252005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237996.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 51123252005 in words is "fifty-one billion, one hundred twenty-three million, two hundred fifty-two thousand, five".