33081361 has 4 divisors (see below), whose sum is σ = 33176500. Its totient is φ = 32986224.

The previous prime is 33081353. The next prime is 33081397. The reversal of 33081361 is 16318033.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16318033 = 149 ⋅109517.

It can be written as a sum of positive squares in 2 ways, for example, as 27878400 + 5202961 = 5280^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 33081361 - 2³ = 33081353 is a prime.

It is a super-2 number, since 2×33081361² = 2188752891224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33081311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47046 + ... + 47743.

It is an arithmetic number, because the mean of its divisors is an integer number (8294125).

Almost surely, 2^33081361 is an apocalyptic number.

It is an amenable number.

33081361 is a deficient number, since it is larger than the sum of its proper divisors (95139).

33081361 is an equidigital number, since it uses as much as digits as its factorization.

33081361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95138.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 33081361 is about 5751.6398531202. The cubic root of 33081361 is about 321.0168209015.

Adding to 33081361 its reverse (16318033), we get a palindrome (49399394).

The spelling of 33081361 in words is "thirty-three million, eighty-one thousand, three hundred sixty-one".