523381 has 4 divisors (see below), whose sum is σ = 525952. Its totient is φ = 520812.

The previous prime is 523357. The next prime is 523387. The reversal of 523381 is 183325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 523381 - 2⁵ = 523349 is a prime.

It is a super-2 number, since 2×523381² = 547855342322, 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 (523387) 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, 951 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (131488).

2⁵²³³⁸¹ is an apocalyptic number.

It is an amenable number.

523381 is a deficient number, since it is larger than the sum of its proper divisors (2571).

523381 is a wasteful number, since it uses less digits than its factorization.

523381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570.

The product of its digits is 720, while the sum is 22.

The square root of 523381 is about 723.4507585178. The cubic root of 523381 is about 80.5884218027.

The spelling of 523381 in words is "five hundred twenty-three thousand, three hundred eighty-one".