231215441 has 8 divisors (see below), whose sum is σ = 237063624. Its totient is φ = 225377280.

The previous prime is 231215423. The next prime is 231215443. The reversal of 231215441 is 144512132.

It can be written as a sum of positive squares in 4 ways, for example, as 297025 + 230918416 = 545^2 + 15196^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231215441 - 2¹⁴ = 231199057 is a prime.

It is a super-3 number, since 3×231215441³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231215443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70265 + ... + 73481.

It is an arithmetic number, because the mean of its divisors is an integer number (29632953).

Almost surely, 2^231215441 is an apocalyptic number.

It is an amenable number.

231215441 is a deficient number, since it is larger than the sum of its proper divisors (5848183).

231215441 is a wasteful number, since it uses less digits than its factorization.

231215441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011.

The product of its digits is 960, while the sum is 23.

The square root of 231215441 is about 15205.7699903688. The cubic root of 231215441 is about 613.7699352385.

Adding to 231215441 its reverse (144512132), we get a palindrome (375727573).

The spelling of 231215441 in words is "two hundred thirty-one million, two hundred fifteen thousand, four hundred forty-one".