231536441 has 4 divisors (see below), whose sum is σ = 231568884. Its totient is φ = 231504000.

The previous prime is 231536401. The next prime is 231536443. The reversal of 231536441 is 144635132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 72675625 + 158860816 = 8525^2 + 12604^2 .

It is a cyclic number.

It is not a de Polignac number, because 231536441 - 2¹⁰ = 231535417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231536443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 21521.

It is an arithmetic number, because the mean of its divisors is an integer number (57892221).

Almost surely, 2^231536441 is an apocalyptic number.

It is an amenable number.

231536441 is a deficient number, since it is larger than the sum of its proper divisors (32443).

231536441 is a wasteful number, since it uses less digits than its factorization.

231536441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32442.

The product of its digits is 8640, while the sum is 29.

The square root of 231536441 is about 15216.3215331433. The cubic root of 231536441 is about 614.0538393515.

The spelling of 231536441 in words is "two hundred thirty-one million, five hundred thirty-six thousand, four hundred forty-one".