51512233012 has 12 divisors (see below), whose sum is σ = 90152036100. Its totient is φ = 25754508416.

The previous prime is 51512232973. The next prime is 51512233027. The reversal of 51512233012 is 21033221515.

It can be written as a sum of positive squares in 2 ways, for example, as 31725309456 + 19786923556 = 178116^2 + 140666^2 .

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, 328453 + ... + 459244.

It is an arithmetic number, because the mean of its divisors is an integer number (7512669675).

Almost surely, 2^51512233012 is an apocalyptic number.

It is an amenable number.

51512233012 is a deficient number, since it is larger than the sum of its proper divisors (38639803088).

51512233012 is a wasteful number, since it uses less digits than its factorization.

51512233012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804050 (or 804048 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 51512233012 its reverse (21033221515), we get a palindrome (72545454527).

The spelling of 51512233012 in words is "fifty-one billion, five hundred twelve million, two hundred thirty-three thousand, twelve".