51012030543240 has 128 divisors (see below), whose sum is σ = 164809921651200. Its totient is φ = 12556668625920.

The previous prime is 51012030543209. The next prime is 51012030543307. The reversal of 51012030543240 is 4234503021015.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51012030543198 and 51012030543207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277995441 + ... + 278178879.

It is an arithmetic number, because the mean of its divisors is an integer number (1287577512900).

Almost surely, 2^{51012030543240} is an apocalyptic number.

It is an amenable number.

51012030543240 is an abundant number, since it is smaller than the sum of its proper divisors (113797891107960).

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

51012030543240 is a wasteful number, since it uses less digits than its factorization.

51012030543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361727 (or 361723 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51012030543240 its reverse (4234503021015), we get a palindrome (55246533564255).

The spelling of 51012030543240 in words is "fifty-one trillion, twelve billion, thirty million, five hundred forty-three thousand, two hundred forty".