231542166 has 16 divisors (see below), whose sum is σ = 463425984. Its totient is φ = 77123784.

The previous prime is 231542149. The next prime is 231542167. The reversal of 231542166 is 661245132.

It is a super-2 number, since 2×231542166² = 107223549271943112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231542167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4960 + ... + 22083.

It is an arithmetic number, because the mean of its divisors is an integer number (28964124).

Almost surely, 2^231542166 is an apocalyptic number.

231542166 is an abundant number, since it is smaller than the sum of its proper divisors (231883818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231542166 is a wasteful number, since it uses less digits than its factorization.

231542166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28475.

The product of its digits is 8640, while the sum is 30.

The square root of 231542166 is about 15216.5096523480. The cubic root of 231542166 is about 614.0589003680.

Adding to 231542166 its reverse (661245132), we get a palindrome (892787298).

The spelling of 231542166 in words is "two hundred thirty-one million, five hundred forty-two thousand, one hundred sixty-six".