51131520333 has 24 divisors (see below), whose sum is σ = 74475399960. Its totient is φ = 33803118720.

The previous prime is 51131520257. The next prime is 51131520343. The reversal of 51131520333 is 33302513115.

51131520333 is a `hidden beast` number, since 5 + 1 + 131 + 520 + 3 + 3 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25442483049 + 25689037284 = 159507^2 + 160278^2 .

It is not a de Polignac number, because 51131520333 - 2³³ = 42541585741 is a prime.

It is a super-2 number, since 2×51131520333² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51131520297 and 51131520306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51131520343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 563463 + ... + 647883.

It is an arithmetic number, because the mean of its divisors is an integer number (3103141665).

Almost surely, 2^51131520333 is an apocalyptic number.

It is an amenable number.

51131520333 is a deficient number, since it is larger than the sum of its proper divisors (23343879627).

51131520333 is a wasteful number, since it uses less digits than its factorization.

51131520333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84989 (or 84986 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The spelling of 51131520333 in words is "fifty-one billion, one hundred thirty-one million, five hundred twenty thousand, three hundred thirty-three".