231211230 has 32 divisors (see below), whose sum is σ = 557826048. Its totient is φ = 61332000.

The previous prime is 231211219. The next prime is 231211291. The reversal of 231211230 is 32112132.

It is a super-2 number, since 2×231211230² = 106917265756225800, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14446 + ... + 25905.

It is an arithmetic number, because the mean of its divisors is an integer number (17432064).

Almost surely, 2^231211230 is an apocalyptic number.

231211230 is an abundant number, since it is smaller than the sum of its proper divisors (326614818).

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

231211230 is a wasteful number, since it uses less digits than its factorization.

231211230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40552.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231211230 is about 15205.6315225643. The cubic root of 231211230 is about 613.7662091308.

Adding to 231211230 its reverse (32112132), we get a palindrome (263323362).

The spelling of 231211230 in words is "two hundred thirty-one million, two hundred eleven thousand, two hundred thirty".