235521023 has 2 divisors, whose sum is σ = 235521024. Its totient is φ = 235521022.

The previous prime is 235521007. The next prime is 235521031. The reversal of 235521023 is 320125532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 235521023 - 2⁴ = 235521007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 235521023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235521053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117760511 + 117760512.

It is an arithmetic number, because the mean of its divisors is an integer number (117760512).

Almost surely, 2^235521023 is an apocalyptic number.

235521023 is a deficient number, since it is larger than the sum of its proper divisors (1).

235521023 is an equidigital number, since it uses as much as digits as its factorization.

235521023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 235521023 is about 15346.6942042904. The cubic root of 235521023 is about 617.5563044814.

Adding to 235521023 its reverse (320125532), we get a palindrome (555646555).

The spelling of 235521023 in words is "two hundred thirty-five million, five hundred twenty-one thousand, twenty-three".