33221013 has 16 divisors (see below), whose sum is σ = 50750976. Its totient is φ = 18935280.

The previous prime is 33221011. The next prime is 33221047. The reversal of 33221013 is 31012233.

It is not a de Polignac number, because 33221013 - 2¹ = 33221011 is a prime.

It is a super-2 number, since 2×33221013² = 2207271409492338, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33220983 and 33221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7518 + ... + 11088.

It is an arithmetic number, because the mean of its divisors is an integer number (3171936).

Almost surely, 2^33221013 is an apocalyptic number.

It is an amenable number.

33221013 is a deficient number, since it is larger than the sum of its proper divisors (17529963).

33221013 is a wasteful number, since it uses less digits than its factorization.

33221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33221013 is about 5763.7672576189. The cubic root of 33221013 is about 321.4679077925.

Adding to 33221013 its reverse (31012233), we get a palindrome (64233246).

The spelling of 33221013 in words is "thirty-three million, two hundred twenty-one thousand, thirteen".