52163381 has 4 divisors (see below), whose sum is σ = 52186092. Its totient is φ = 52140672.

The previous prime is 52163347. The next prime is 52163387. The reversal of 52163381 is 18336125.

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 20702500 + 31460881 = 4550^2 + 5609^2 .

It is a cyclic number.

It is not a de Polignac number, because 52163381 - 2⁶ = 52163317 is a prime.

It is a super-2 number, since 2×52163381² = 5442036634702322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52163387) 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, 7466 + ... + 12651.

It is an arithmetic number, because the mean of its divisors is an integer number (13046523).

Almost surely, 2^52163381 is an apocalyptic number.

It is an amenable number.

52163381 is a deficient number, since it is larger than the sum of its proper divisors (22711).

52163381 is a wasteful number, since it uses less digits than its factorization.

52163381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22710.

The product of its digits is 4320, while the sum is 29.

The square root of 52163381 is about 7222.4221006529. The cubic root of 52163381 is about 373.6416181453.

The spelling of 52163381 in words is "fifty-two million, one hundred sixty-three thousand, three hundred eighty-one".