51631280252 has 12 divisors (see below), whose sum is σ = 90853939176. Its totient is φ = 25673011920.

The previous prime is 51631280251. The next prime is 51631280273. The reversal of 51631280252 is 25208213615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51631280251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35656238 + ... + 35657685.

It is an arithmetic number, because the mean of its divisors is an integer number (7571161598).

Almost surely, 2^51631280252 is an apocalyptic number.

It is an amenable number.

51631280252 is a deficient number, since it is larger than the sum of its proper divisors (39222658924).

51631280252 is a wasteful number, since it uses less digits than its factorization.

51631280252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71314108 (or 71314106 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 51631280252 its reverse (25208213615), we get a palindrome (76839493867).

The spelling of 51631280252 in words is "fifty-one billion, six hundred thirty-one million, two hundred eighty thousand, two hundred fifty-two".