523881 has 8 divisors (see below), whose sum is σ = 776160. Its totient is φ = 349236.

The previous prime is 523877. The next prime is 523903. The reversal of 523881 is 188325.

It is a happy number.

It is not a de Polignac number, because 523881 - 2² = 523877 is a prime.

It is a super-2 number, since 2×523881² = 548902604322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 19403 = 523881 / (5 + 2 + 3 + 8 + 8 + 1).

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 523881.

It is not an unprimeable number, because it can be changed into a prime (523801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9675 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2⁵²³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

523881 is a deficient number, since it is larger than the sum of its proper divisors (252279).

523881 is a wasteful number, since it uses less digits than its factorization.

523881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19412 (or 19406 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 523881 is about 723.7962420461. The cubic root of 523881 is about 80.6140764000.

The spelling of 523881 in words is "five hundred twenty-three thousand, eight hundred eighty-one".