51243623415 has 24 divisors (see below), whose sum is σ = 91222885728. Its totient is φ = 26591284800.

The previous prime is 51243623411. The next prime is 51243623507. The reversal of 51243623415 is 51432634215.

51243623415 is a `hidden beast` number, since 5 + 1 + 24 + 3 + 623 + 4 + 1 + 5 = 666.

It is not a de Polignac number, because 51243623415 - 2² = 51243623411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51243623415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51243623411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15386811 + ... + 15390140.

It is an arithmetic number, because the mean of its divisors is an integer number (3800953572).

Almost surely, 2^51243623415 is an apocalyptic number.

51243623415 is a deficient number, since it is larger than the sum of its proper divisors (39979262313).

51243623415 is a wasteful number, since it uses less digits than its factorization.

51243623415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30776999 (or 30776996 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 51243623415 in words is "fifty-one billion, two hundred forty-three million, six hundred twenty-three thousand, four hundred fifteen".