33490561 has 12 divisors (see below), whose sum is σ = 38401452. Its totient is φ = 29093376.

The previous prime is 33490547. The next prime is 33490573. The reversal of 33490561 is 16509433.

It can be written as a sum of positive squares in 6 ways, for example, as 497025 + 32993536 = 705^2 + 5744^2 .

It is not a de Polignac number, because 33490561 - 2⁵ = 33490529 is a prime.

It is a super-2 number, since 2×33490561² = 2243235352189442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33490361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2956 + ... + 8701.

It is an arithmetic number, because the mean of its divisors is an integer number (3200121).

Almost surely, 2^33490561 is an apocalyptic number.

It is an amenable number.

33490561 is a deficient number, since it is larger than the sum of its proper divisors (4910891).

33490561 is a wasteful number, since it uses less digits than its factorization.

33490561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11700 (or 11687 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 33490561 is about 5787.1029885427. The cubic root of 33490561 is about 322.3350068433.

Adding to 33490561 its reverse (16509433), we get a palindrome (49999994).

The spelling of 33490561 in words is "thirty-three million, four hundred ninety thousand, five hundred sixty-one".