52681391 has 8 divisors (see below), whose sum is σ = 60741024. Its totient is φ = 44755200.

The previous prime is 52681381. The next prime is 52681397. The reversal of 52681391 is 19318625.

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

It is not a de Polignac number, because 52681391 - 2⁶ = 52681327 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 (52681397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32510 + ... + 34091.

It is an arithmetic number, because the mean of its divisors is an integer number (7592628).

Almost surely, 2^52681391 is an apocalyptic number.

52681391 is a deficient number, since it is larger than the sum of its proper divisors (8059633).

52681391 is a wasteful number, since it uses less digits than its factorization.

52681391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66721.

The product of its digits is 12960, while the sum is 35.

The square root of 52681391 is about 7258.1947480072. The cubic root of 52681391 is about 374.8743662107.

The spelling of 52681391 in words is "fifty-two million, six hundred eighty-one thousand, three hundred ninety-one".