231241320 has 192 divisors, whose sum is σ = 778377600. Its totient is φ = 59512320.

The previous prime is 231241291. The next prime is 231241337. The reversal of 231241320 is 23142132.

231241320 is a `hidden beast` number, since 231 + 2 + 413 + 20 = 666.

231241320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231241293 and 231241302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2121426 + ... + 2121534.

It is an arithmetic number, because the mean of its divisors is an integer number (4054050).

Almost surely, 2^231241320 is an apocalyptic number.

231241320 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 231241320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389188800).

231241320 is an abundant number, since it is smaller than the sum of its proper divisors (547136280).

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

231241320 is a wasteful number, since it uses less digits than its factorization.

231241320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231241320 is about 15206.6209264254. The cubic root of 231241320 is about 613.7928333049.

Adding to 231241320 its reverse (23142132), we get a palindrome (254383452).

The spelling of 231241320 in words is "two hundred thirty-one million, two hundred forty-one thousand, three hundred twenty".