51086383251 has 4 divisors (see below), whose sum is σ = 68115177672. Its totient is φ = 34057588832.

The previous prime is 51086383223. The next prime is 51086383253. The reversal of 51086383251 is 15238368015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51086383251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51086383253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8514397206 + ... + 8514397211.

It is an arithmetic number, because the mean of its divisors is an integer number (17028794418).

Almost surely, 2^51086383251 is an apocalyptic number.

51086383251 is a deficient number, since it is larger than the sum of its proper divisors (17028794421).

51086383251 is a wasteful number, since it uses less digits than its factorization.

51086383251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17028794420.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 51086383251 in words is "fifty-one billion, eighty-six million, three hundred eighty-three thousand, two hundred fifty-one".