51533525140 has 12 divisors (see below), whose sum is σ = 108220402836. Its totient is φ = 20613410048.

The previous prime is 51533525129. The next prime is 51533525179. The reversal of 51533525140 is 4152533515.

It can be written as a sum of positive squares in 2 ways, for example, as 35042342416 + 16491182724 = 187196^2 + 128418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51533525096 and 51533525105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288338109 + ... + 1288338148.

It is an arithmetic number, because the mean of its divisors is an integer number (9018366903).

Almost surely, 2^51533525140 is an apocalyptic number.

It is an amenable number.

51533525140 is an abundant number, since it is smaller than the sum of its proper divisors (56686877696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51533525140 is a wasteful number, since it uses less digits than its factorization.

51533525140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576676266 (or 2576676264 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 51533525140 in words is "fifty-one billion, five hundred thirty-three million, five hundred twenty-five thousand, one hundred forty".