51224012440 has 64 divisors (see below), whose sum is σ = 116481641760. Its totient is φ = 20271667200.

The previous prime is 51224012431. The next prime is 51224012443. The reversal of 51224012440 is 4421042215.

51224012440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224012443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6569184 + ... + 6576976.

Almost surely, 2^51224012440 is an apocalyptic number.

It is an amenable number.

51224012440 is an abundant number, since it is smaller than the sum of its proper divisors (65257629320).

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

51224012440 is a wasteful number, since it uses less digits than its factorization.

51224012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532 (or 9528 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 51224012440 its reverse (4421042215), we get a palindrome (55645054655).

The spelling of 51224012440 in words is "fifty-one billion, two hundred twenty-four million, twelve thousand, four hundred forty".