33813001 has 4 divisors (see below), whose sum is σ = 34056400. Its totient is φ = 33569604.

The previous prime is 33812903. The next prime is 33813019. The reversal of 33813001 is 10031833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10031833 = 7 ⋅1433119.

It is a cyclic number.

It is not a de Polignac number, because 33813001 - 2⁷ = 33812873 is a prime.

It is a super-2 number, since 2×33813001² = 2286638073252002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33813001.

It is not an unprimeable number, because it can be changed into a prime (33813061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121491 + ... + 121768.

It is an arithmetic number, because the mean of its divisors is an integer number (8514100).

Almost surely, 2^33813001 is an apocalyptic number.

33813001 is the 2601-st centered decagonal number.

It is an amenable number.

33813001 is a deficient number, since it is larger than the sum of its proper divisors (243399).

33813001 is a wasteful number, since it uses less digits than its factorization.

33813001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243398.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 33813001 is about 5814.8947539917. The cubic root of 33813001 is about 323.3661622764.

Adding to 33813001 its reverse (10031833), we get a palindrome (43844834).

The spelling of 33813001 in words is "thirty-three million, eight hundred thirteen thousand, one".