243231147 has 16 divisors (see below), whose sum is σ = 369132960. Its totient is φ = 158198400.

The previous prime is 243231143. The next prime is 243231167. The reversal of 243231147 is 741132342.

It is a happy number.

It is not a de Polignac number, because 243231147 - 2² = 243231143 is a prime.

It is a super-2 number, since 2×243231147² = 118322781741871218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 243231147.

It is not an unprimeable number, because it can be changed into a prime (243231143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108754 + ... + 110967.

It is an arithmetic number, because the mean of its divisors is an integer number (23070810).

Almost surely, 2^243231147 is an apocalyptic number.

243231147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

243231147 is a deficient number, since it is larger than the sum of its proper divisors (125901813).

243231147 is a wasteful number, since it uses less digits than its factorization.

243231147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219771 (or 219765 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 243231147 is about 15595.8695493390. The cubic root of 243231147 is about 624.2229464074. Note that the first 3 decimals are identical.

Adding to 243231147 its reverse (741132342), we get a palindrome (984363489).

The spelling of 243231147 in words is "two hundred forty-three million, two hundred thirty-one thousand, one hundred forty-seven".