231422040 has 96 divisors (see below), whose sum is σ = 770515200. Its totient is φ = 60203520.

The previous prime is 231422039. The next prime is 231422063. The reversal of 231422040 is 40224132.

231422040 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6921 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (8026200).

Almost surely, 2^231422040 is an apocalyptic number.

231422040 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 231422040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385257600).

231422040 is an abundant number, since it is smaller than the sum of its proper divisors (539093160).

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

231422040 is a wasteful number, since it uses less digits than its factorization.

231422040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15737 (or 15730 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 231422040 is about 15212.5619144180. The cubic root of 231422040 is about 613.9526890445.

Adding to 231422040 its reverse (40224132), we get a palindrome (271646172).

The spelling of 231422040 in words is "two hundred thirty-one million, four hundred twenty-two thousand, forty".