231542265 has 32 divisors (see below), whose sum is σ = 406932480. Its totient is φ = 111900096.

The previous prime is 231542243. The next prime is 231542279. The reversal of 231542265 is 562245132.

It is not a de Polignac number, because 231542265 - 2⁸ = 231542009 is a prime.

It is a super-2 number, since 2×231542265² = 107223640962660450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11107 + ... + 24216.

It is an arithmetic number, because the mean of its divisors is an integer number (12716640).

Almost surely, 2^231542265 is an apocalyptic number.

It is an amenable number.

231542265 is a deficient number, since it is larger than the sum of its proper divisors (175390215).

231542265 is a wasteful number, since it uses less digits than its factorization.

231542265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35373.

The product of its digits is 14400, while the sum is 30.

The square root of 231542265 is about 15216.5129053933. The cubic root of 231542265 is about 614.0589878853.

Adding to 231542265 its reverse (562245132), we get a palindrome (793787397).

The spelling of 231542265 in words is "two hundred thirty-one million, five hundred forty-two thousand, two hundred sixty-five".