33221423 has 2 divisors, whose sum is σ = 33221424. Its totient is φ = 33221422.

The previous prime is 33221411. The next prime is 33221431. The reversal of 33221423 is 32412233.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33221423 is a prime.

It is a super-2 number, since 2×33221423² = 2207325892289858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33221395 and 33221404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33221323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16610711 + 16610712.

It is an arithmetic number, because the mean of its divisors is an integer number (16610712).

Almost surely, 2^33221423 is an apocalyptic number.

33221423 is a deficient number, since it is larger than the sum of its proper divisors (1).

33221423 is an equidigital number, since it uses as much as digits as its factorization.

33221423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 20.

The square root of 33221423 is about 5763.8028245248. The cubic root of 33221423 is about 321.4692302617.

Adding to 33221423 its reverse (32412233), we get a palindrome (65633656).

The spelling of 33221423 in words is "thirty-three million, two hundred twenty-one thousand, four hundred twenty-three".