243474231 has 32 divisors (see below), whose sum is σ = 435875328. Its totient is φ = 116749440.

The previous prime is 243474223. The next prime is 243474293. The reversal of 243474231 is 132474342.

It is not a de Polignac number, because 243474231 - 2³ = 243474223 is a prime.

It is a super-2 number, since 2×243474231² = 118559402322082722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243474331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37536 + ... + 43541.

It is an arithmetic number, because the mean of its divisors is an integer number (13621104).

Almost surely, 2^243474231 is an apocalyptic number.

243474231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243474231 is a deficient number, since it is larger than the sum of its proper divisors (192401097).

243474231 is a wasteful number, since it uses less digits than its factorization.

243474231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81111.

The product of its digits is 16128, while the sum is 30.

The square root of 243474231 is about 15603.6608204613. The cubic root of 243474231 is about 624.4308256088.

It can be divided in two parts, 243 and 474231, that added together give a palindrome (474474).

The spelling of 243474231 in words is "two hundred forty-three million, four hundred seventy-four thousand, two hundred thirty-one".