235221013 has 2 divisors, whose sum is σ = 235221014. Its totient is φ = 235221012.

The previous prime is 235220983. The next prime is 235221017. The reversal of 235221013 is 310122532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144552529 + 90668484 = 12023^2 + 9522^2 .

It is a cyclic number.

It is not a de Polignac number, because 235221013 - 2⁹ = 235220501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235221017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117610506 + 117610507.

It is an arithmetic number, because the mean of its divisors is an integer number (117610507).

Almost surely, 2^235221013 is an apocalyptic number.

It is an amenable number.

235221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

235221013 is an equidigital number, since it uses as much as digits as its factorization.

235221013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 235221013 is about 15336.9166718738. The cubic root of 235221013 is about 617.2939757544.

Adding to 235221013 its reverse (310122532), we get a palindrome (545343545).

The spelling of 235221013 in words is "two hundred thirty-five million, two hundred twenty-one thousand, thirteen".