231424505 has 16 divisors (see below), whose sum is σ = 312076800. Its totient is φ = 163466688.

The previous prime is 231424489. The next prime is 231424507. The reversal of 231424505 is 505424132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231424505 - 2⁴ = 231424489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231424507) 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, 75905 + ... + 78894.

It is an arithmetic number, because the mean of its divisors is an integer number (19504800).

Almost surely, 2^231424505 is an apocalyptic number.

It is an amenable number.

231424505 is a deficient number, since it is larger than the sum of its proper divisors (80652295).

231424505 is a wasteful number, since it uses less digits than its factorization.

231424505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154840.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 231424505 is about 15212.6429327714. The cubic root of 231424505 is about 613.9548688830.

Adding to 231424505 its reverse (505424132), we get a palindrome (736848637).

The spelling of 231424505 in words is "two hundred thirty-one million, four hundred twenty-four thousand, five hundred five".