52391391 has 8 divisors (see below), whose sum is σ = 75228720. Its totient is φ = 32240832.

The previous prime is 52391369. The next prime is 52391393. The reversal of 52391391 is 19319325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52391391 - 2⁵ = 52391359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52391393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671646 + ... + 671723.

It is an arithmetic number, because the mean of its divisors is an integer number (9403590).

Almost surely, 2^52391391 is an apocalyptic number.

52391391 is a deficient number, since it is larger than the sum of its proper divisors (22837329).

52391391 is a wasteful number, since it uses less digits than its factorization.

52391391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343385.

The product of its digits is 7290, while the sum is 33.

The square root of 52391391 is about 7238.1897598778. The cubic root of 52391391 is about 374.1852319122.

The spelling of 52391391 in words is "fifty-two million, three hundred ninety-one thousand, three hundred ninety-one".