433221961 has 2 divisors, whose sum is σ = 433221962. Its totient is φ = 433221960.

The previous prime is 433221959. The next prime is 433221967. The reversal of 433221961 is 169122334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378535936 + 54686025 = 19456^2 + 7395^2 .

It is a cyclic number.

It is not a de Polignac number, because 433221961 - 2¹ = 433221959 is a prime.

Together with 433221959, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (433221967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216610980 + 216610981.

It is an arithmetic number, because the mean of its divisors is an integer number (216610981).

Almost surely, 2^433221961 is an apocalyptic number.

It is an amenable number.

433221961 is a deficient number, since it is larger than the sum of its proper divisors (1).

433221961 is an equidigital number, since it uses as much as digits as its factorization.

433221961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 433221961 is about 20813.9847458386. The cubic root of 433221961 is about 756.6647248641.

The spelling of 433221961 in words is "four hundred thirty-three million, two hundred twenty-one thousand, nine hundred sixty-one".