33240131 has 4 divisors (see below), whose sum is σ = 33259752. Its totient is φ = 33220512.

The previous prime is 33240127. The next prime is 33240133. The reversal of 33240131 is 13104233.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13104233 = 151 ⋅86783.

It is a cyclic number.

It is not a de Polignac number, because 33240131 - 2² = 33240127 is a prime.

It is a super-2 number, since 2×33240131² = 2209812617794322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33240133) 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, 7001 + ... + 10746.

It is an arithmetic number, because the mean of its divisors is an integer number (8314938).

Almost surely, 2^33240131 is an apocalyptic number.

33240131 is a deficient number, since it is larger than the sum of its proper divisors (19621).

33240131 is a wasteful number, since it uses less digits than its factorization.

33240131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620.

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

The square root of 33240131 is about 5765.4254829978. The cubic root of 33240131 is about 321.5295619922.

Adding to 33240131 its reverse (13104233), we get a palindrome (46344364).

The spelling of 33240131 in words is "thirty-three million, two hundred forty thousand, one hundred thirty-one".