231200220 has 48 divisors (see below), whose sum is σ = 648053280. Its totient is φ = 61587456.

The previous prime is 231200131. The next prime is 231200231. The reversal of 231200220 is 22002132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 231200196 and 231200205.

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, 84636 + ... + 87324.

It is an arithmetic number, because the mean of its divisors is an integer number (13501110).

Almost surely, 2^231200220 is an apocalyptic number.

231200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231200220 is an abundant number, since it is smaller than the sum of its proper divisors (416853060).

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

231200220 is a wasteful number, since it uses less digits than its factorization.

231200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4132 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 231200220 is about 15205.2694813344. The cubic root of 231200220 is about 613.7564667072.

Adding to 231200220 its reverse (22002132), we get a palindrome (253202352).

The spelling of 231200220 in words is "two hundred thirty-one million, two hundred thousand, two hundred twenty".