231544441 has 2 divisors, whose sum is σ = 231544442. Its totient is φ = 231544440.

The previous prime is 231544387. The next prime is 231544451. The reversal of 231544441 is 144445132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182250000 + 49294441 = 13500^2 + 7021^2 .

It is a cyclic number.

It is not a de Polignac number, because 231544441 - 2²³ = 223155833 is a prime.

It is a super-2 number, since 2×231544441² = 107225656316004962, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 231544441 parts by 21519 straight cuts.

It is not a weakly prime, because it can be changed into another prime (231544451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115772220 + 115772221.

It is an arithmetic number, because the mean of its divisors is an integer number (115772221).

Almost surely, 2^231544441 is an apocalyptic number.

It is an amenable number.

231544441 is a deficient number, since it is larger than the sum of its proper divisors (1).

231544441 is an equidigital number, since it uses as much as digits as its factorization.

231544441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 28.

The square root of 231544441 is about 15216.5844064954. The cubic root of 231544441 is about 614.0609114912.

Adding to 231544441 its reverse (144445132), we get a palindrome (375989573).

The spelling of 231544441 in words is "two hundred thirty-one million, five hundred forty-four thousand, four hundred forty-one".