231543930 has 16 divisors (see below), whose sum is σ = 555705504. Its totient is φ = 61745040.

The previous prime is 231543919. The next prime is 231543931. The reversal of 231543930 is 39345132.

It is a super-2 number, since 2×231543930² = 107225183039689800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7718131 = 231543930 / (2 + 3 + 1 + 5 + 4 + 3 + 9 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231543931) 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, 3859036 + ... + 3859095.

It is an arithmetic number, because the mean of its divisors is an integer number (34731594).

Almost surely, 2^231543930 is an apocalyptic number.

231543930 is an abundant number, since it is smaller than the sum of its proper divisors (324161574).

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

231543930 is a wasteful number, since it uses less digits than its factorization.

231543930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718141.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 231543930 is about 15216.5676155958. The cubic root of 231543930 is about 614.0604597631.

The spelling of 231543930 in words is "two hundred thirty-one million, five hundred forty-three thousand, nine hundred thirty".