51651251340 has 96 divisors (see below), whose sum is σ = 162520114176. Its totient is φ = 12161360640.

The previous prime is 51651251329. The next prime is 51651251341. The reversal of 51651251340 is 4315215615.

It is not an unprimeable number, because it can be changed into a prime (51651251341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1421616 + ... + 1457495.

It is an arithmetic number, because the mean of its divisors is an integer number (1692917856).

Almost surely, 2^51651251340 is an apocalyptic number.

It is an amenable number.

51651251340 is an abundant number, since it is smaller than the sum of its proper divisors (110868862836).

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

51651251340 is a wasteful number, since it uses less digits than its factorization.

51651251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879159 (or 2879157 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 51651251340 its reverse (4315215615), we get a palindrome (55966466955).

The spelling of 51651251340 in words is "fifty-one billion, six hundred fifty-one million, two hundred fifty-one thousand, three hundred forty".