33120231 has 8 divisors (see below), whose sum is σ = 44385264. Its totient is φ = 21967680.

The previous prime is 33120229. The next prime is 33120239. The reversal of 33120231 is 13202133.

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

It is not a de Polignac number, because 33120231 - 2¹ = 33120229 is a prime.

It is a super-2 number, since 2×33120231² = 2193899402986722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33120231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33120239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27430 + ... + 28611.

It is an arithmetic number, because the mean of its divisors is an integer number (5548158).

Almost surely, 2^33120231 is an apocalyptic number.

33120231 is a deficient number, since it is larger than the sum of its proper divisors (11265033).

33120231 is a wasteful number, since it uses less digits than its factorization.

33120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56241.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33120231 is about 5755.0178974526. The cubic root of 33120231 is about 321.1425013403.

Adding to 33120231 its reverse (13202133), we get a palindrome (46322364).

The spelling of 33120231 in words is "thirty-three million, one hundred twenty thousand, two hundred thirty-one".