33722209 has 4 divisors (see below), whose sum is σ = 35188416. Its totient is φ = 32256004.

The previous prime is 33722201. The next prime is 33722219. The reversal of 33722209 is 90222733.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33722209 - 2³ = 33722201 is a prime.

It is a super-2 number, since 2×33722209² = 2274374759679362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33722201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733069 + ... + 733114.

It is an arithmetic number, because the mean of its divisors is an integer number (8797104).

Almost surely, 2^33722209 is an apocalyptic number.

It is an amenable number.

33722209 is a deficient number, since it is larger than the sum of its proper divisors (1466207).

33722209 is a wasteful number, since it uses less digits than its factorization.

33722209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466206.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 33722209 is about 5807.0826582717. The cubic root of 33722209 is about 323.0764770809.

The spelling of 33722209 in words is "thirty-three million, seven hundred twenty-two thousand, two hundred nine".