51170091 has 32 divisors (see below), whose sum is σ = 80790528. Its totient is φ = 28200960.

The previous prime is 51170089. The next prime is 51170099. The reversal of 51170091 is 19007115.

51170091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51170091 - 2¹ = 51170089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51170099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88395 + ... + 88971.

It is an arithmetic number, because the mean of its divisors is an integer number (2524704).

Almost surely, 2^51170091 is an apocalyptic number.

51170091 is a deficient number, since it is larger than the sum of its proper divisors (29620437).

51170091 is a wasteful number, since it uses less digits than its factorization.

51170091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 51170091 is about 7153.3272677825. The cubic root of 51170091 is about 371.2547877717.

The spelling of 51170091 in words is "fifty-one million, one hundred seventy thousand, ninety-one".