231154720 has 96 divisors (see below), whose sum is σ = 565439616. Its totient is φ = 89241600.

The previous prime is 231154717. The next prime is 231154723. The reversal of 231154720 is 27451132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231154717) and next prime (231154723).

It is not an unprimeable number, because it can be changed into a prime (231154723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1095415 + ... + 1095625.

It is an arithmetic number, because the mean of its divisors is an integer number (5889996).

Almost surely, 2^231154720 is an apocalyptic number.

231154720 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 231154720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282719808).

231154720 is an abundant number, since it is smaller than the sum of its proper divisors (334284896).

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

231154720 is a wasteful number, since it uses less digits than its factorization.

231154720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 231154720 is about 15203.7732158830. The cubic root of 231154720 is about 613.7162018214.

The spelling of 231154720 in words is "two hundred thirty-one million, one hundred fifty-four thousand, seven hundred twenty".