33140431 has 4 divisors (see below), whose sum is σ = 33363000. Its totient is φ = 32917864.

The previous prime is 33140413. The next prime is 33140441. The reversal of 33140431 is 13404133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33140431 is a prime.

It is a super-2 number, since 2×33140431² = 2196576333731522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33140399 and 33140408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33140441) 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, 111061 + ... + 111358.

It is an arithmetic number, because the mean of its divisors is an integer number (8340750).

Almost surely, 2^33140431 is an apocalyptic number.

33140431 is a deficient number, since it is larger than the sum of its proper divisors (222569).

33140431 is a wasteful number, since it uses less digits than its factorization.

33140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222568.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 33140431 is about 5756.7726201406. The cubic root of 33140431 is about 321.2077762489.

Adding to 33140431 its reverse (13404133), we get a palindrome (46544564).

The spelling of 33140431 in words is "thirty-three million, one hundred forty thousand, four hundred thirty-one".