33631481 has 8 divisors (see below), whose sum is σ = 36337224. Its totient is φ = 30942720.

The previous prime is 33631417. The next prime is 33631489. The reversal of 33631481 is 18413633.

It can be written as a sum of positive squares in 4 ways, for example, as 672400 + 32959081 = 820^2 + 5741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33631481 - 2⁶ = 33631417 is a prime.

It is a super-2 number, since 2×33631481² = 2262153028506722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33631489) 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 7 ways as a sum of consecutive naturals, for example, 41 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (4542153).

Almost surely, 2^33631481 is an apocalyptic number.

It is an amenable number.

33631481 is a deficient number, since it is larger than the sum of its proper divisors (2705743).

33631481 is a wasteful number, since it uses less digits than its factorization.

33631481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491.

The product of its digits is 5184, while the sum is 29.

The square root of 33631481 is about 5799.2655569477. The cubic root of 33631481 is about 322.7864762137.

The spelling of 33631481 in words is "thirty-three million, six hundred thirty-one thousand, four hundred eighty-one".