33020131 has 4 divisors (see below), whose sum is σ = 33148872. Its totient is φ = 32891392.

The previous prime is 33020123. The next prime is 33020153. The reversal of 33020131 is 13102033.

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 33020131 - 2³ = 33020123 is a prime.

It is a super-2 number, since 2×33020131² = 2180658102514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33020191) 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, 63985 + ... + 64498.

It is an arithmetic number, because the mean of its divisors is an integer number (8287218).

Almost surely, 2^33020131 is an apocalyptic number.

33020131 is a deficient number, since it is larger than the sum of its proper divisors (128741).

33020131 is a wasteful number, since it uses less digits than its factorization.

33020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128740.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 33020131 is about 5746.3145580450. The cubic root of 33020131 is about 320.8186428460.

Adding to 33020131 its reverse (13102033), we get a palindrome (46122164).

The spelling of 33020131 in words is "thirty-three million, twenty thousand, one hundred thirty-one".