231224505 has 16 divisors (see below), whose sum is σ = 381894144. Its totient is φ = 119341440.

The previous prime is 231224501. The next prime is 231224527. The reversal of 231224505 is 505422132.

231224505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231224505 - 2² = 231224501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231224501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248164 + ... + 249093.

It is an arithmetic number, because the mean of its divisors is an integer number (23868384).

Almost surely, 2^231224505 is an apocalyptic number.

It is an amenable number.

231224505 is a deficient number, since it is larger than the sum of its proper divisors (150669639).

231224505 is a wasteful number, since it uses less digits than its factorization.

231224505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497296.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 231224505 is about 15206.0680322035. The cubic root of 231224505 is about 613.7779553747. Note that the first 3 decimals are identical.

Adding to 231224505 its reverse (505422132), we get a palindrome (736646637).

The spelling of 231224505 in words is "two hundred thirty-one million, two hundred twenty-four thousand, five hundred five".