231809280 has 288 divisors, whose sum is σ = 810601344. Its totient is φ = 56229888.

The previous prime is 231809273. The next prime is 231809287. The reversal of 231809280 is 82908132.

It is an interprime number because it is at equal distance from previous prime (231809273) and next prime (231809287).

It is not an unprimeable number, because it can be changed into a prime (231809287) 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, 3459807 + ... + 3459873.

It is an arithmetic number, because the mean of its divisors is an integer number (2814588).

Almost surely, 2^231809280 is an apocalyptic number.

231809280 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 231809280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405300672).

231809280 is an abundant number, since it is smaller than the sum of its proper divisors (578792064).

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

231809280 is a wasteful number, since it uses less digits than its factorization.

231809280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 231809280 is about 15225.2842338000. The cubic root of 231809280 is about 614.2949418893.

The spelling of 231809280 in words is "two hundred thirty-one million, eight hundred nine thousand, two hundred eighty".