51085536 has 24 divisors (see below), whose sum is σ = 134099784. Its totient is φ = 17028480.

The previous prime is 51085513. The next prime is 51085537. The reversal of 51085536 is 63558015.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 51085497 and 51085506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51085537) 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, 265975 + ... + 266166.

It is an arithmetic number, because the mean of its divisors is an integer number (5587491).

Almost surely, 2^51085536 is an apocalyptic number.

It is an amenable number.

51085536 is an abundant number, since it is smaller than the sum of its proper divisors (83014248).

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

51085536 is a wasteful number, since it uses less digits than its factorization.

51085536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532154 (or 532146 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 51085536 is about 7147.4146374756. The cubic root of 51085536 is about 371.0501841671.

The spelling of 51085536 in words is "fifty-one million, eighty-five thousand, five hundred thirty-six".