51253140212 has 6 divisors (see below), whose sum is σ = 89692995378. Its totient is φ = 25626570104.

The previous prime is 51253140173. The next prime is 51253140221. The reversal of 51253140212 is 21204135215.

It can be written as a sum of positive squares in only one way, i.e., 35436556516 + 15816583696 = 188246^2 + 125764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406642523 + ... + 6406642530.

It is an arithmetic number, because the mean of its divisors is an integer number (14948832563).

Almost surely, 2^51253140212 is an apocalyptic number.

It is an amenable number.

51253140212 is a deficient number, since it is larger than the sum of its proper divisors (38439855166).

51253140212 is a wasteful number, since it uses less digits than its factorization.

51253140212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12813285057 (or 12813285055 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 51253140212 its reverse (21204135215), we get a palindrome (72457275427).

The spelling of 51253140212 in words is "fifty-one billion, two hundred fifty-three million, one hundred forty thousand, two hundred twelve".