535881 has 4 divisors (see below), whose sum is σ = 714512. Its totient is φ = 357252.

The previous prime is 535879. The next prime is 535919. The reversal of 535881 is 188535.

It is a happy number.

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 not a de Polignac number, because 535881 - 2¹ = 535879 is a prime.

It is a super-2 number, since 2×535881² = 574336892322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (535811) 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, 89311 + ... + 89316.

It is an arithmetic number, because the mean of its divisors is an integer number (178628).

2⁵³⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

535881 is a deficient number, since it is larger than the sum of its proper divisors (178631).

535881 is a wasteful number, since it uses less digits than its factorization.

535881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178630.

The product of its digits is 4800, while the sum is 30.

The square root of 535881 is about 732.0389333908. The cubic root of 535881 is about 81.2249500687.

The spelling of 535881 in words is "five hundred thirty-five thousand, eight hundred eighty-one".