231263340 has 144 divisors (see below), whose sum is σ = 821850624. Its totient is φ = 48048000.

The previous prime is 231263311. The next prime is 231263341. The reversal of 231263340 is 43362132.

231263340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231263340.

It is not an unprimeable number, because it can be changed into a prime (231263341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28765 + ... + 35915.

It is an arithmetic number, because the mean of its divisors is an integer number (5707296).

Almost surely, 2^231263340 is an apocalyptic number.

231263340 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 231263340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410925312).

231263340 is an abundant number, since it is smaller than the sum of its proper divisors (590587284).

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

231263340 is a wasteful number, since it uses less digits than its factorization.

231263340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7188 (or 7179 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 231263340 is about 15207.3449359183. The cubic root of 231263340 is about 613.8123155341.

The spelling of 231263340 in words is "two hundred thirty-one million, two hundred sixty-three thousand, three hundred forty".