231542720 has 112 divisors (see below), whose sum is σ = 603065088. Its totient is φ = 84295680.

The previous prime is 231542713. The next prime is 231542747. The reversal of 231542720 is 27245132.

231542720 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 2×231542720² = 107224062369996800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231542720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167954 + ... + 169326.

Almost surely, 2^231542720 is an apocalyptic number.

231542720 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 231542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301532544).

231542720 is an abundant number, since it is smaller than the sum of its proper divisors (371522368).

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

231542720 is a wasteful number, since it uses less digits than its factorization.

231542720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 231542720 is about 15216.5278562489. The cubic root of 231542720 is about 614.0593901109.

Adding to 231542720 its reverse (27245132), we get a palindrome (258787852).

The spelling of 231542720 in words is "two hundred thirty-one million, five hundred forty-two thousand, seven hundred twenty".