52681399 has 4 divisors (see below), whose sum is σ = 53403136. Its totient is φ = 51959664.

The previous prime is 52681397. The next prime is 52681403. The reversal of 52681399 is 99318625.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52681399 - 2¹ = 52681397 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 3 ways as a sum of consecutive naturals, for example, 360759 + ... + 360904.

It is an arithmetic number, because the mean of its divisors is an integer number (13350784).

Almost surely, 2^52681399 is an apocalyptic number.

52681399 is a deficient number, since it is larger than the sum of its proper divisors (721737).

52681399 is an equidigital number, since it uses as much as digits as its factorization.

52681399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721736.

The product of its digits is 116640, while the sum is 43.

The square root of 52681399 is about 7258.1952991084. The cubic root of 52681399 is about 374.8743851864.

The spelling of 52681399 in words is "fifty-two million, six hundred eighty-one thousand, three hundred ninety-nine".