52170891 has 4 divisors (see below), whose sum is σ = 69561192. Its totient is φ = 34780592.

The previous prime is 52170883. The next prime is 52170907. The reversal of 52170891 is 19807125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52170891 - 2³ = 52170883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52170791) 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, 8695146 + ... + 8695151.

It is an arithmetic number, because the mean of its divisors is an integer number (17390298).

Almost surely, 2^52170891 is an apocalyptic number.

52170891 is a deficient number, since it is larger than the sum of its proper divisors (17390301).

52170891 is a wasteful number, since it uses less digits than its factorization.

52170891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17390300.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 52170891 is about 7222.9419906296. The cubic root of 52170891 is about 373.6595484370.

The spelling of 52170891 in words is "fifty-two million, one hundred seventy thousand, eight hundred ninety-one".