249549231 has 16 divisors (see below), whose sum is σ = 338887040. Its totient is φ = 163300320.

The previous prime is 249549217. The next prime is 249549283. The reversal of 249549231 is 132945942.

It is not a de Polignac number, because 249549231 - 2¹⁰ = 249548207 is a prime.

It is a super-2 number, since 2×249549231² = 124549637385382722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249549231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249548231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112176 + ... + 114378.

It is an arithmetic number, because the mean of its divisors is an integer number (21180440).

Almost surely, 2^249549231 is an apocalyptic number.

249549231 is a deficient number, since it is larger than the sum of its proper divisors (89337809).

249549231 is a wasteful number, since it uses less digits than its factorization.

249549231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886.

The product of its digits is 77760, while the sum is 39.

The square root of 249549231 is about 15797.1273021395. The cubic root of 249549231 is about 629.5816749232.

The spelling of 249549231 in words is "two hundred forty-nine million, five hundred forty-nine thousand, two hundred thirty-one".