33320401 has 2 divisors, whose sum is σ = 33320402. Its totient is φ = 33320400.

The previous prime is 33320389. The next prime is 33320407. The reversal of 33320401 is 10402333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29419776 + 3900625 = 5424^2 + 1975^2 .

It is an emirp because it is prime and its reverse (10402333) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33320401 - 2⁵ = 33320369 is a prime.

It is a super-2 number, since 2×33320401² = 2220498245601602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33320407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16660200 + 16660201.

It is an arithmetic number, because the mean of its divisors is an integer number (16660201).

Almost surely, 2^33320401 is an apocalyptic number.

It is an amenable number.

33320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

33320401 is an equidigital number, since it uses as much as digits as its factorization.

33320401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33320401 is about 5772.3826103265. The cubic root of 33320401 is about 321.7881693831.

Adding to 33320401 its reverse (10402333), we get a palindrome (43722734).

The spelling of 33320401 in words is "thirty-three million, three hundred twenty thousand, four hundred one".