52357381 has 4 divisors (see below), whose sum is σ = 52435852. Its totient is φ = 52278912.

The previous prime is 52357379. The next prime is 52357397. The reversal of 52357381 is 18375325.

52357381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 29604481 + 22752900 = 5441^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 52357381 - 2¹ = 52357379 is a prime.

It is a super-2 number, since 2×52357381² = 5482590690358322, 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 (52357301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38226 + ... + 39571.

It is an arithmetic number, because the mean of its divisors is an integer number (13108963).

Almost surely, 2^52357381 is an apocalyptic number.

It is an amenable number.

52357381 is a deficient number, since it is larger than the sum of its proper divisors (78471).

52357381 is an equidigital number, since it uses as much as digits as its factorization.

52357381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78470.

The product of its digits is 25200, while the sum is 34.

The square root of 52357381 is about 7235.8400341633. The cubic root of 52357381 is about 374.1042466320.

The spelling of 52357381 in words is "fifty-two million, three hundred fifty-seven thousand, three hundred eighty-one".