231200020 has 24 divisors (see below), whose sum is σ = 485811144. Its totient is φ = 92424576.

The previous prime is 231199993. The next prime is 231200023. The reversal of 231200020 is 20002132.

It can be written as a sum of positive squares in 4 ways, for example, as 67667076 + 163532944 = 8226^2 + 12788^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231200023) 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, 53874 + ... + 58006.

It is an arithmetic number, because the mean of its divisors is an integer number (20242131).

Almost surely, 2^231200020 is an apocalyptic number.

231200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231200020 is an abundant number, since it is smaller than the sum of its proper divisors (254611124).

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

231200020 is a wasteful number, since it uses less digits than its factorization.

231200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939 (or 6937 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 231200020 is about 15205.2629046656. The cubic root of 231200020 is about 613.7562897303.

Adding to 231200020 its reverse (20002132), we get a palindrome (251202152).

It can be divided in two parts, 2312000 and 20, that multiplied together give a square (46240000 = 6800²).

The spelling of 231200020 in words is "two hundred thirty-one million, two hundred thousand, twenty".