52388381 has 4 divisors (see below), whose sum is σ = 52412700. Its totient is φ = 52364064.

The previous prime is 52388351. The next prime is 52388383. The reversal of 52388381 is 18388325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37100281 + 15288100 = 6091^2 + 3910^2 .

It is a cyclic number.

It is not a de Polignac number, because 52388381 - 2⁶ = 52388317 is a prime.

It is a super-2 number, since 2×52388381² = 5489084927602322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52388383) 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, 8576 + ... + 13353.

It is an arithmetic number, because the mean of its divisors is an integer number (13103175).

Almost surely, 2^52388381 is an apocalyptic number.

It is an amenable number.

52388381 is a deficient number, since it is larger than the sum of its proper divisors (24319).

52388381 is a wasteful number, since it uses less digits than its factorization.

52388381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24318.

The product of its digits is 46080, while the sum is 38.

The square root of 52388381 is about 7237.9818319750. The cubic root of 52388381 is about 374.1780658550.

The spelling of 52388381 in words is "fifty-two million, three hundred eighty-eight thousand, three hundred eighty-one".