51513025244 has 48 divisors (see below), whose sum is σ = 91491434496. Its totient is φ = 25376198400.

The previous prime is 51513025231. The next prime is 51513025279. The reversal of 51513025244 is 44252031515.

It is a self number, because there is not a number n which added to its sum of digits gives 51513025244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81636809 + ... + 81637439.

It is an arithmetic number, because the mean of its divisors is an integer number (1906071552).

Almost surely, 2^51513025244 is an apocalyptic number.

It is an amenable number.

51513025244 is a deficient number, since it is larger than the sum of its proper divisors (39978409252).

51513025244 is a wasteful number, since it uses less digits than its factorization.

51513025244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 51513025244 its reverse (44252031515), we get a palindrome (95765056759).

The spelling of 51513025244 in words is "fifty-one billion, five hundred thirteen million, twenty-five thousand, two hundred forty-four".