51120531351 has 48 divisors (see below), whose sum is σ = 77381111808. Its totient is φ = 33723799200.

The previous prime is 51120531281. The next prime is 51120531359. The reversal of 51120531351 is 15313502115.

51120531351 is a `hidden beast` number, since 5 + 1 + 120 + 531 + 3 + 5 + 1 = 666.

It is not a de Polignac number, because 51120531351 - 2¹⁴ = 51120514967 is a prime.

It is a super-2 number, since 2×51120531351² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120531359) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9140566 + ... + 9146156.

It is an arithmetic number, because the mean of its divisors is an integer number (1612106496).

Almost surely, 2^51120531351 is an apocalyptic number.

51120531351 is a deficient number, since it is larger than the sum of its proper divisors (26260580457).

51120531351 is a wasteful number, since it uses less digits than its factorization.

51120531351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994 (or 5982 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The spelling of 51120531351 in words is "fifty-one billion, one hundred twenty million, five hundred thirty-one thousand, three hundred fifty-one".