51242004135 has 56 divisors (see below), whose sum is σ = 105363975840. Its totient is φ = 23424904512.

The previous prime is 51242004133. The next prime is 51242004167. The reversal of 51242004135 is 53140024215.

51242004135 is a `hidden beast` number, since 5 + 1 + 242 + 0 + 0 + 413 + 5 = 666.

It is not a de Polignac number, because 51242004135 - 2¹ = 51242004133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51242004099 and 51242004108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242004133) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 978640 + ... + 1029669.

Almost surely, 2^51242004135 is an apocalyptic number.

51242004135 is an abundant number, since it is smaller than the sum of its proper divisors (54121971705).

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

51242004135 is an equidigital number, since it uses as much as digits as its factorization.

51242004135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008339 (or 2008324 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 51242004135 in words is "fifty-one billion, two hundred forty-two million, four thousand, one hundred thirty-five".