231301152 has 72 divisors (see below), whose sum is σ = 667635696. Its totient is φ = 75943296.

The previous prime is 231301139. The next prime is 231301153. The reversal of 231301152 is 251103132.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231301153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13303 + ... + 25289.

It is an arithmetic number, because the mean of its divisors is an integer number (9272718).

Almost surely, 2^231301152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231301152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333817848).

231301152 is an abundant number, since it is smaller than the sum of its proper divisors (436334544).

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

231301152 is a wasteful number, since it uses less digits than its factorization.

231301152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12070 (or 12059 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 231301152 is about 15208.5881001492. The cubic root of 231301152 is about 613.8457668750.

Adding to 231301152 its reverse (251103132), we get a palindrome (482404284).

The spelling of 231301152 in words is "two hundred thirty-one million, three hundred one thousand, one hundred fifty-two".