231145552 has 40 divisors (see below), whose sum is σ = 489477600. Its totient is φ = 104868480.

The previous prime is 231145451. The next prime is 231145567. The reversal of 231145552 is 255541132.

231145552 is digitally balanced in base 3, 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 231145552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135199 + ... + 136897.

It is an arithmetic number, because the mean of its divisors is an integer number (12236940).

Almost surely, 2^231145552 is an apocalyptic number.

231145552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231145552 is an abundant number, since it is smaller than the sum of its proper divisors (258332048).

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

231145552 is a wasteful number, since it uses less digits than its factorization.

231145552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491 (or 2485 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 231145552 is about 15203.4717087907. The cubic root of 231145552 is about 613.7080880286.

Adding to 231145552 its reverse (255541132), we get a palindrome (486686684).

The spelling of 231145552 in words is "two hundred thirty-one million, one hundred forty-five thousand, five hundred fifty-two".