51086133 has 64 divisors (see below), whose sum is σ = 90685440. Its totient is φ = 28168560.

The previous prime is 51086111. The next prime is 51086137. The reversal of 51086133 is 33168015.

It is not a de Polignac number, because 51086133 - 2¹⁰ = 51085109 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 = 51086097 and 51086106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 719488 + ... + 719558.

It is an arithmetic number, because the mean of its divisors is an integer number (1416960).

Almost surely, 2^51086133 is an apocalyptic number.

It is an amenable number.

51086133 is a deficient number, since it is larger than the sum of its proper divisors (39599307).

51086133 is an frugal number, since it uses more digits than its factorization.

51086133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51086133 is about 7147.4564007065. The cubic root of 51086133 is about 371.0516295606.

The spelling of 51086133 in words is "fifty-one million, eighty-six thousand, one hundred thirty-three".