231433545 has 32 divisors (see below), whose sum is σ = 424535040. Its totient is φ = 105462720.

The previous prime is 231433523. The next prime is 231433549. The reversal of 231433545 is 545334132.

It is not a de Polignac number, because 231433545 - 2⁵ = 231433513 is a prime.

It is a super-2 number, since 2×231433545² = 107122971502534050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231433549) 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, 31426 + ... + 38084.

It is an arithmetic number, because the mean of its divisors is an integer number (13266720).

Almost surely, 2^231433545 is an apocalyptic number.

It is an amenable number.

231433545 is a deficient number, since it is larger than the sum of its proper divisors (193101495).

231433545 is a wasteful number, since it uses less digits than its factorization.

231433545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7005.

The product of its digits is 21600, while the sum is 30.

The square root of 231433545 is about 15212.9400511538. The cubic root of 231433545 is about 613.9628629655.

Adding to 231433545 its reverse (545334132), we get a palindrome (776767677).

The spelling of 231433545 in words is "two hundred thirty-one million, four hundred thirty-three thousand, five hundred forty-five".