233232331621 has 2 divisors, whose sum is σ = 233232331622. Its totient is φ = 233232331620.

The previous prime is 233232331561. The next prime is 233232331639. The reversal of 233232331621 is 126133232332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188563509121 + 44668822500 = 434239^2 + 211350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233232331621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233232331681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116616165810 + 116616165811.

It is an arithmetic number, because the mean of its divisors is an integer number (116616165811).

Almost surely, 2^233232331621 is an apocalyptic number.

It is an amenable number.

233232331621 is a deficient number, since it is larger than the sum of its proper divisors (1).

233232331621 is an equidigital number, since it uses as much as digits as its factorization.

233232331621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 31.

Adding to 233232331621 its reverse (126133232332), we get a palindrome (359365563953).

The spelling of 233232331621 in words is "two hundred thirty-three billion, two hundred thirty-two million, three hundred thirty-one thousand, six hundred twenty-one".