231455565 has 24 divisors (see below), whose sum is σ = 437662368. Its totient is φ = 112220640.

The previous prime is 231455563. The next prime is 231455573. The reversal of 231455565 is 565554132.

It is not a de Polignac number, because 231455565 - 2¹ = 231455563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231455563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233299 + ... + 234288.

It is an arithmetic number, because the mean of its divisors is an integer number (18235932).

Almost surely, 2^231455565 is an apocalyptic number.

It is an amenable number.

231455565 is a deficient number, since it is larger than the sum of its proper divisors (206206803).

231455565 is a wasteful number, since it uses less digits than its factorization.

231455565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467609 (or 467606 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 231455565 is about 15213.6637599232. The cubic root of 231455565 is about 613.9823344060.

The spelling of 231455565 in words is "two hundred thirty-one million, four hundred fifty-five thousand, five hundred sixty-five".