233221493 has 2 divisors, whose sum is σ = 233221494. Its totient is φ = 233221492.

The previous prime is 233221441. The next prime is 233221501. The reversal of 233221493 is 394122332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127193284 + 106028209 = 11278^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 233221493 - 2⁸ = 233221237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233221993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116610746 + 116610747.

It is an arithmetic number, because the mean of its divisors is an integer number (116610747).

Almost surely, 2^233221493 is an apocalyptic number.

It is an amenable number.

233221493 is a deficient number, since it is larger than the sum of its proper divisors (1).

233221493 is an equidigital number, since it uses as much as digits as its factorization.

233221493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 233221493 is about 15271.5910435030. The cubic root of 233221493 is about 615.5398727338.

The spelling of 233221493 in words is "two hundred thirty-three million, two hundred twenty-one thousand, four hundred ninety-three".