52131391 has 8 divisors (see below), whose sum is σ = 56515424. Its totient is φ = 47800800.

The previous prime is 52131337. The next prime is 52131419. The reversal of 52131391 is 19313125.

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

It is a cyclic number.

It is not a de Polignac number, because 52131391 - 2⁹ = 52130879 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 (52131311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11316 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (7064428).

Almost surely, 2^52131391 is an apocalyptic number.

52131391 is a deficient number, since it is larger than the sum of its proper divisors (4384033).

52131391 is a wasteful number, since it uses less digits than its factorization.

52131391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26721.

The product of its digits is 810, while the sum is 25.

The square root of 52131391 is about 7220.2071299929. The cubic root of 52131391 is about 373.5652220262.

The spelling of 52131391 in words is "fifty-two million, one hundred thirty-one thousand, three hundred ninety-one".