231543315 has 48 divisors (see below), whose sum is σ = 426748608. Its totient is φ = 115734528.

The previous prime is 231543311. The next prime is 231543343. The reversal of 231543315 is 513345132.

It is not a de Polignac number, because 231543315 - 2² = 231543311 is a prime.

It is a super-2 number, since 2×231543315² = 107224613442378450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231543311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 238962 + ... + 239928.

It is an arithmetic number, because the mean of its divisors is an integer number (8890596).

Almost surely, 2^231543315 is an apocalyptic number.

231543315 is a deficient number, since it is larger than the sum of its proper divisors (195205293).

231543315 is a wasteful number, since it uses less digits than its factorization.

231543315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 1305 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 231543315 is about 15216.5474073457. The cubic root of 231543315 is about 614.0599160974.

Adding to 231543315 its reverse (513345132), we get a palindrome (744888447).

The spelling of 231543315 in words is "two hundred thirty-one million, five hundred forty-three thousand, three hundred fifteen".