52687191 has 4 divisors (see below), whose sum is σ = 70249592. Its totient is φ = 35124792.

The previous prime is 52687157. The next prime is 52687207. The reversal of 52687191 is 19178625.

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

It is not a de Polignac number, because 52687191 - 2⁶ = 52687127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52687291) 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, 8781196 + ... + 8781201.

It is an arithmetic number, because the mean of its divisors is an integer number (17562398).

Almost surely, 2^52687191 is an apocalyptic number.

52687191 is a deficient number, since it is larger than the sum of its proper divisors (17562401).

52687191 is a wasteful number, since it uses less digits than its factorization.

52687191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17562400.

The product of its digits is 30240, while the sum is 39.

The square root of 52687191 is about 7258.5942853971. The cubic root of 52687191 is about 374.8881230706. Note that the first 3 decimals are identical.

The spelling of 52687191 in words is "fifty-two million, six hundred eighty-seven thousand, one hundred ninety-one".