231269505 has 16 divisors (see below), whose sum is σ = 373626240. Its totient is φ = 122145408.

The previous prime is 231269491. The next prime is 231269543. The reversal of 231269505 is 505962132.

It is not a de Polignac number, because 231269505 - 2⁵ = 231269473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73300 + ... + 76389.

It is an arithmetic number, because the mean of its divisors is an integer number (23351640).

Almost surely, 2^231269505 is an apocalyptic number.

It is an amenable number.

231269505 is a deficient number, since it is larger than the sum of its proper divisors (142356735).

231269505 is a wasteful number, since it uses less digits than its factorization.

231269505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149800.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 231269505 is about 15207.5476326724. The cubic root of 231269505 is about 613.8177698059.

It can be divided in two parts, 2312 and 69505, that added together give a palindrome (71817).

The spelling of 231269505 in words is "two hundred thirty-one million, two hundred sixty-nine thousand, five hundred five".