235661441 has 2 divisors, whose sum is σ = 235661442. Its totient is φ = 235661440.

The previous prime is 235661383. The next prime is 235661443. The reversal of 235661441 is 144166532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227135041 + 8526400 = 15071^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 235661441 - 2¹⁰ = 235660417 is a prime.

It is a Sophie Germain prime.

Together with 235661443, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 235661398 and 235661407.

It is not a weakly prime, because it can be changed into another prime (235661443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117830720 + 117830721.

It is an arithmetic number, because the mean of its divisors is an integer number (117830721).

Almost surely, 2^235661441 is an apocalyptic number.

It is an amenable number.

235661441 is a deficient number, since it is larger than the sum of its proper divisors (1).

235661441 is an equidigital number, since it uses as much as digits as its factorization.

235661441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 235661441 is about 15351.2683840782. The cubic root of 235661441 is about 617.6790094419.

The spelling of 235661441 in words is "two hundred thirty-five million, six hundred sixty-one thousand, four hundred forty-one".