33380561 has 4 divisors (see below), whose sum is σ = 33396324. Its totient is φ = 33364800.

The previous prime is 33380551. The next prime is 33380569. The reversal of 33380561 is 16508333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16508333 = 97 ⋅170189.

It can be written as a sum of positive squares in 2 ways, for example, as 16000000 + 17380561 = 4000^2 + 4169^2 .

It is a cyclic number.

It is not a de Polignac number, because 33380561 - 2¹⁸ = 33118417 is a prime.

It is a super-2 number, since 2×33380561² = 2228523705349442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33380569) 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, 4100 + ... + 9141.

It is an arithmetic number, because the mean of its divisors is an integer number (8349081).

Almost surely, 2^33380561 is an apocalyptic number.

It is an amenable number.

33380561 is a deficient number, since it is larger than the sum of its proper divisors (15763).

33380561 is a wasteful number, since it uses less digits than its factorization.

33380561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15762.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 33380561 is about 5777.5912801097. The cubic root of 33380561 is about 321.9817158451.

Adding to 33380561 its reverse (16508333), we get a palindrome (49888894).

The spelling of 33380561 in words is "thirty-three million, three hundred eighty thousand, five hundred sixty-one".