51253133140 has 24 divisors (see below), whose sum is σ = 117416269152. Its totient is φ = 18637502880.

The previous prime is 51253133119. The next prime is 51253133149. The reversal of 51253133140 is 4133135215.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51253133099 and 51253133108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253133149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116484174 + ... + 116484613.

It is an arithmetic number, because the mean of its divisors is an integer number (4892344548).

Almost surely, 2^51253133140 is an apocalyptic number.

It is an amenable number.

51253133140 is an abundant number, since it is smaller than the sum of its proper divisors (66163136012).

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

51253133140 is a wasteful number, since it uses less digits than its factorization.

51253133140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232968807 (or 232968805 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 51253133140 its reverse (4133135215), we get a palindrome (55386268355).

The spelling of 51253133140 in words is "fifty-one billion, two hundred fifty-three million, one hundred thirty-three thousand, one hundred forty".