51270132440 has 32 divisors (see below), whose sum is σ = 119079020160. Its totient is φ = 19846502400.

The previous prime is 51270132317. The next prime is 51270132443. The reversal of 51270132440 is 4423107215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51270132443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20672201 + ... + 20674680.

It is an arithmetic number, because the mean of its divisors is an integer number (3721219380).

Almost surely, 2^51270132440 is an apocalyptic number.

It is an amenable number.

51270132440 is an abundant number, since it is smaller than the sum of its proper divisors (67808887720).

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

51270132440 is a wasteful number, since it uses less digits than its factorization.

51270132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41346923 (or 41346919 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 51270132440 its reverse (4423107215), we get a palindrome (55693239655).

The spelling of 51270132440 in words is "fifty-one billion, two hundred seventy million, one hundred thirty-two thousand, four hundred forty".