51432505251 has 32 divisors (see below), whose sum is σ = 69682636800. Its totient is φ = 33741272064.

The previous prime is 51432505237. The next prime is 51432505303. The reversal of 51432505251 is 15250523415.

It is not a de Polignac number, because 51432505251 - 2⁵ = 51432505219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51432505651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22626451 + ... + 22628723.

It is an arithmetic number, because the mean of its divisors is an integer number (2177582400).

Almost surely, 2^51432505251 is an apocalyptic number.

51432505251 is a deficient number, since it is larger than the sum of its proper divisors (18250131549).

51432505251 is a wasteful number, since it uses less digits than its factorization.

51432505251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 51432505251 in words is "fifty-one billion, four hundred thirty-two million, five hundred five thousand, two hundred fifty-one".