33401231 has 4 divisors (see below), whose sum is σ = 33423600. Its totient is φ = 33378864.

The previous prime is 33401219. The next prime is 33401233. The reversal of 33401231 is 13210433.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33401231 - 2²² = 29206927 is a prime.

It is a super-2 number, since 2×33401231² = 2231284464630722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33401233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8771 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (8355900).

Almost surely, 2^33401231 is an apocalyptic number.

33401231 is a deficient number, since it is larger than the sum of its proper divisors (22369).

33401231 is a wasteful number, since it uses less digits than its factorization.

33401231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22368.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33401231 is about 5779.3798110178. The cubic root of 33401231 is about 322.0481615910.

Adding to 33401231 its reverse (13210433), we get a palindrome (46611664).

The spelling of 33401231 in words is "thirty-three million, four hundred one thousand, two hundred thirty-one".