33722081 has 4 divisors (see below), whose sum is σ = 34274964. Its totient is φ = 33169200.

The previous prime is 33722069. The next prime is 33722083. The reversal of 33722081 is 18022733.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4389025 + 29333056 = 2095^2 + 5416^2 .

It is a cyclic number.

It is not a de Polignac number, because 33722081 - 2¹⁰ = 33721057 is a prime.

It is a super-2 number, since 2×33722081² = 2274357493941122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33722081.

It is not an unprimeable number, because it can be changed into a prime (33722083) 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, 276350 + ... + 276471.

It is an arithmetic number, because the mean of its divisors is an integer number (8568741).

Almost surely, 2^33722081 is an apocalyptic number.

It is an amenable number.

33722081 is a deficient number, since it is larger than the sum of its proper divisors (552883).

33722081 is an equidigital number, since it uses as much as digits as its factorization.

33722081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552882.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 33722081 is about 5807.0716372368. The cubic root of 33722081 is about 323.0760683113.

The spelling of 33722081 in words is "thirty-three million, seven hundred twenty-two thousand, eighty-one".