51105310440 has 64 divisors (see below), whose sum is σ = 153360034560. Its totient is φ = 13624162560.

The previous prime is 51105310433. The next prime is 51105310453. The reversal of 51105310440 is 4401350115.

It is a happy number.

It is a super-2 number, since 2×51105310440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51105310440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370257 + ... + 489183.

It is an arithmetic number, because the mean of its divisors is an integer number (2396250540).

Almost surely, 2^51105310440 is an apocalyptic number.

It is an amenable number.

51105310440 is an abundant number, since it is smaller than the sum of its proper divisors (102254724120).

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

51105310440 is a wasteful number, since it uses less digits than its factorization.

51105310440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122522 (or 122518 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 51105310440 its reverse (4401350115), we get a palindrome (55506660555).

The spelling of 51105310440 in words is "fifty-one billion, one hundred five million, three hundred ten thousand, four hundred forty".