33021413 has 2 divisors, whose sum is σ = 33021414. Its totient is φ = 33021412.

The previous prime is 33021409. The next prime is 33021421. The reversal of 33021413 is 31412033.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22118209 + 10903204 = 4703^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 33021413 - 2² = 33021409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33021391 and 33021400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33021473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510706 + 16510707.

It is an arithmetic number, because the mean of its divisors is an integer number (16510707).

Almost surely, 2^33021413 is an apocalyptic number.

It is an amenable number.

33021413 is a deficient number, since it is larger than the sum of its proper divisors (1).

33021413 is an equidigital number, since it uses as much as digits as its factorization.

33021413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33021413 is about 5746.4261067206. The cubic root of 33021413 is about 320.8227946989.

Adding to 33021413 its reverse (31412033), we get a palindrome (64433446).

The spelling of 33021413 in words is "thirty-three million, twenty-one thousand, four hundred thirteen".