51000120331 has 8 divisors (see below), whose sum is σ = 52775031600. Its totient is φ = 49226294880.

The previous prime is 51000120317. The next prime is 51000120349. The reversal of 51000120331 is 13302100015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51000120331 - 2⁵ = 51000120299 is a prime.

It is a super-2 number, since 2×51000120331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51000120361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175300 + ... + 364321.

It is an arithmetic number, because the mean of its divisors is an integer number (6596878950).

Almost surely, 2^51000120331 is an apocalyptic number.

51000120331 is a deficient number, since it is larger than the sum of its proper divisors (1774911269).

51000120331 is a wasteful number, since it uses less digits than its factorization.

51000120331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542909.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 51000120331 its reverse (13302100015), we get a palindrome (64302220346).

The spelling of 51000120331 in words is "fifty-one billion, one hundred twenty thousand, three hundred thirty-one".