33140235431 has 4 divisors (see below), whose sum is σ = 34283002200. Its totient is φ = 31997468664.

The previous prime is 33140235419. The next prime is 33140235481. The reversal of 33140235431 is 13453204133.

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 33140235431 - 2¹⁸ = 33139973287 is a prime.

It is a super-2 number, since 2×33140235431² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1142766739 = 33140235431 / (3 + 3 + 1 + 4 + 0 + 2 + 3 + 5 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33140235394 and 33140235403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33140235481) 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, 571383341 + ... + 571383398.

It is an arithmetic number, because the mean of its divisors is an integer number (8570750550).

Almost surely, 2^33140235431 is an apocalyptic number.

33140235431 is a deficient number, since it is larger than the sum of its proper divisors (1142766769).

33140235431 is a wasteful number, since it uses less digits than its factorization.

33140235431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142766768.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 33140235431 its reverse (13453204133), we get a palindrome (46593439564).

The spelling of 33140235431 in words is "thirty-three billion, one hundred forty million, two hundred thirty-five thousand, four hundred thirty-one".