231543105 has 16 divisors (see below), whose sum is σ = 383244480. Its totient is φ = 119231168.

The previous prime is 231543097. The next prime is 231543119. The reversal of 231543105 is 501345132.

It is a cyclic number.

It is not a de Polignac number, because 231543105 - 2³ = 231543097 is a prime.

It is a super-2 number, since 2×231543105² = 107224418946082050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265707 + ... + 266576.

It is an arithmetic number, because the mean of its divisors is an integer number (23952780).

Almost surely, 2^231543105 is an apocalyptic number.

It is an amenable number.

231543105 is a deficient number, since it is larger than the sum of its proper divisors (151701375).

231543105 is a wasteful number, since it uses less digits than its factorization.

231543105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532320.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 231543105 is about 15216.5405069615. The cubic root of 231543105 is about 614.0597304552.

Adding to 231543105 its reverse (501345132), we get a palindrome (732888237).

The spelling of 231543105 in words is "two hundred thirty-one million, five hundred forty-three thousand, one hundred five".