51242224334440 has 16 divisors (see below), whose sum is σ = 115295004752580. Its totient is φ = 20496889733760.

The previous prime is 51242224334227. The next prime is 51242224334503. The reversal of 51242224334440 is 4443342224215.

It can be written as a sum of positive squares in 2 ways, for example, as 48442351682916 + 2799872651524 = 6960054^2 + 1673282^2 .

It is a super-2 number, since 2×51242224334440² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1281055608361 = 51242224334440 / (5 + 1 + 2 + 4 + 2 + 2 + 2 + 4 + 3 + 3 + 4 + 4 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 51242224334393 and 51242224334402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640527804141 + ... + 640527804220.

Almost surely, 2^{51242224334440} is an apocalyptic number.

It is an amenable number.

51242224334440 is an abundant number, since it is smaller than the sum of its proper divisors (64052780418140).

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

51242224334440 is a wasteful number, since it uses less digits than its factorization.

51242224334440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281055608372 (or 1281055608368 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 40.

Adding to 51242224334440 its reverse (4443342224215), we get a palindrome (55685566558655).

The spelling of 51242224334440 in words is "fifty-one trillion, two hundred forty-two billion, two hundred twenty-four million, three hundred thirty-four thousand, four hundred forty".