231220230 has 48 divisors (see below), whose sum is σ = 589513680. Its totient is φ = 58029568.

The previous prime is 231220229. The next prime is 231220237. The reversal of 231220230 is 32022132.

It is a super-2 number, since 2×231220230² = 106925589522505800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4665 + ... + 22004.

It is an arithmetic number, because the mean of its divisors is an integer number (12281535).

Almost surely, 2^231220230 is an apocalyptic number.

231220230 is an abundant number, since it is smaller than the sum of its proper divisors (358293450).

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

231220230 is a wasteful number, since it uses less digits than its factorization.

231220230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26713 (or 26696 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 231220230 is about 15205.9274626706. The cubic root of 231220230 is about 613.7741727351.

Adding to 231220230 its reverse (32022132), we get a palindrome (263242362).

The spelling of 231220230 in words is "two hundred thirty-one million, two hundred twenty thousand, two hundred thirty".