51350131867 has 4 divisors (see below), whose sum is σ = 53582746320. Its totient is φ = 49117517416.

The previous prime is 51350131853. The next prime is 51350131907. The reversal of 51350131867 is 76813105315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76813105315 = 5 ⋅15362621063.

It is a cyclic number.

It is not a de Polignac number, because 51350131867 - 2⁷ = 51350131739 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51350131817) 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, 1116307192 + ... + 1116307237.

It is an arithmetic number, because the mean of its divisors is an integer number (13395686580).

Almost surely, 2^51350131867 is an apocalyptic number.

51350131867 is a deficient number, since it is larger than the sum of its proper divisors (2232614453).

51350131867 is a wasteful number, since it uses less digits than its factorization.

51350131867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232614452.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 51350131867 in words is "fifty-one billion, three hundred fifty million, one hundred thirty-one thousand, eight hundred sixty-seven".