51250135507 has 4 divisors (see below), whose sum is σ = 53947511080. Its totient is φ = 48552759936.

The previous prime is 51250135483. The next prime is 51250135511. The reversal of 51250135507 is 70553105215.

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

It is a cyclic number.

It is not a de Polignac number, because 51250135507 - 2⁷ = 51250135379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51250135567) 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, 1348687758 + ... + 1348687795.

It is an arithmetic number, because the mean of its divisors is an integer number (13486877770).

Almost surely, 2^51250135507 is an apocalyptic number.

51250135507 is a deficient number, since it is larger than the sum of its proper divisors (2697375573).

51250135507 is a wasteful number, since it uses less digits than its factorization.

51250135507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697375572.

The product of its (nonzero) digits is 26250, while the sum is 34.

The spelling of 51250135507 in words is "fifty-one billion, two hundred fifty million, one hundred thirty-five thousand, five hundred seven".