52731391 has 2 divisors, whose sum is σ = 52731392. Its totient is φ = 52731390.

The previous prime is 52731377. The next prime is 52731397. The reversal of 52731391 is 19313725.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52731391 - 2¹¹ = 52729343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52731397) 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 as a sum of consecutive naturals, namely, 26365695 + 26365696.

It is an arithmetic number, because the mean of its divisors is an integer number (26365696).

Almost surely, 2^52731391 is an apocalyptic number.

52731391 is a deficient number, since it is larger than the sum of its proper divisors (1).

52731391 is an equidigital number, since it uses as much as digits as its factorization.

52731391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 31.

The square root of 52731391 is about 7261.6383137691. The cubic root of 52731391 is about 374.9929266814.

The spelling of 52731391 in words is "fifty-two million, seven hundred thirty-one thousand, three hundred ninety-one".