231226320 has 160 divisors (see below), whose sum is σ = 793199232. Its totient is φ = 55351296.

The previous prime is 231226279. The next prime is 231226327. The reversal of 231226320 is 23622132.

231226320 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 2×231226320² = 106931222121484800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231226327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114439 + ... + 116441.

Almost surely, 2^231226320 is an apocalyptic number.

231226320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231226320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396599616).

231226320 is an abundant number, since it is smaller than the sum of its proper divisors (561972912).

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

231226320 is a wasteful number, since it uses less digits than its factorization.

231226320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231226320 is about 15206.1277122087. The cubic root of 231226320 is about 613.7795613234.

Adding to 231226320 its reverse (23622132), we get a palindrome (254848452).

The spelling of 231226320 in words is "two hundred thirty-one million, two hundred twenty-six thousand, three hundred twenty".