231123530 has 16 divisors (see below), whose sum is σ = 453842784. Its totient is φ = 84044880.

The previous prime is 231123523. The next prime is 231123539. The reversal of 231123530 is 35321132.

231123530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231123530² = 106836172239321800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231123539) 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, 1050452 + ... + 1050671.

It is an arithmetic number, because the mean of its divisors is an integer number (28365174).

Almost surely, 2^231123530 is an apocalyptic number.

231123530 is a deficient number, since it is larger than the sum of its proper divisors (222719254).

231123530 is a wasteful number, since it uses less digits than its factorization.

231123530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101141.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231123530 is about 15202.7474490633. The cubic root of 231123530 is about 613.6885974109.

Adding to 231123530 its reverse (35321132), we get a palindrome (266444662).

The spelling of 231123530 in words is "two hundred thirty-one million, one hundred twenty-three thousand, five hundred thirty".