51230415640 has 16 divisors (see below), whose sum is σ = 115268435280. Its totient is φ = 20492166240.

The previous prime is 51230415601. The next prime is 51230415641. The reversal of 51230415640 is 4651403215.

It is a happy number.

51230415640 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 (51230415641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640380156 + ... + 640380235.

It is an arithmetic number, because the mean of its divisors is an integer number (7204277205).

Almost surely, 2^51230415640 is an apocalyptic number.

It is an amenable number.

51230415640 is an abundant number, since it is smaller than the sum of its proper divisors (64038019640).

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

51230415640 is a wasteful number, since it uses less digits than its factorization.

51230415640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280760402 (or 1280760398 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 51230415640 its reverse (4651403215), we get a palindrome (55881818855).

The spelling of 51230415640 in words is "fifty-one billion, two hundred thirty million, four hundred fifteen thousand, six hundred forty".