51521171260 has 24 divisors (see below), whose sum is σ = 116517110976. Its totient is φ = 19023201600.

The previous prime is 51521171257. The next prime is 51521171281. The reversal of 51521171260 is 6217112515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99078916 + ... + 99079435.

It is an arithmetic number, because the mean of its divisors is an integer number (4854879624).

Almost surely, 2^51521171260 is an apocalyptic number.

It is an amenable number.

51521171260 is an abundant number, since it is smaller than the sum of its proper divisors (64995939716).

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

51521171260 is a wasteful number, since it uses less digits than its factorization.

51521171260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198158373 (or 198158371 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 51521171260 its reverse (6217112515), we get a palindrome (57738283775).

The spelling of 51521171260 in words is "fifty-one billion, five hundred twenty-one million, one hundred seventy-one thousand, two hundred sixty".