51642135 has 24 divisors (see below), whose sum is σ = 89794224. Its totient is φ = 27456000.

The previous prime is 51642119. The next prime is 51642139. The reversal of 51642135 is 53124615.

51642135 is a `hidden beast` number, since 5 + 1 + 642 + 13 + 5 = 666.

It is not a de Polignac number, because 51642135 - 2⁴ = 51642119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51642099 and 51642108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14260 + ... + 17510.

It is an arithmetic number, because the mean of its divisors is an integer number (3741426).

Almost surely, 2^51642135 is an apocalyptic number.

51642135 is a deficient number, since it is larger than the sum of its proper divisors (38152089).

51642135 is a wasteful number, since it uses less digits than its factorization.

51642135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615 (or 3612 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51642135 is about 7186.2462384753. The cubic root of 51642135 is about 372.3929034641.

The spelling of 51642135 in words is "fifty-one million, six hundred forty-two thousand, one hundred thirty-five".