298531 has 4 divisors (see below), whose sum is σ = 299632. Its totient is φ = 297432.

The previous prime is 298513. The next prime is 298559. The reversal of 298531 is 135892.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-298531 is a prime.

It is a super-2 number, since 2×298531² = 178241515922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

298531 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 298531.

It is not an unprimeable number, because it can be changed into a prime (298031) 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, 181 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (74908).

2²⁹⁸⁵³¹ is an apocalyptic number.

298531 is a deficient number, since it is larger than the sum of its proper divisors (1101).

298531 is an equidigital number, since it uses as much as digits as its factorization.

298531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its digits is 2160, while the sum is 28.

The square root of 298531 is about 546.3799044621. The cubic root of 298531 is about 66.8338498408.

The spelling of 298531 in words is "two hundred ninety-eight thousand, five hundred thirty-one".