33144042421 has 12 divisors (see below), whose sum is σ = 38559170988. Its totient is φ = 28406337792.

The previous prime is 33144042413. The next prime is 33144042443. The reversal of 33144042421 is 12424044133.

It can be written as a sum of positive squares in 2 ways, for example, as 8065836100 + 25078206321 = 89810^2 + 158361^2 .

It is not a de Polignac number, because 33144042421 - 2³ = 33144042413 is a prime.

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 33144042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33144042221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569925 + ... + 625381.

It is an arithmetic number, because the mean of its divisors is an integer number (3213264249).

Almost surely, 2^33144042421 is an apocalyptic number.

It is an amenable number.

33144042421 is a deficient number, since it is larger than the sum of its proper divisors (5415128567).

33144042421 is a wasteful number, since it uses less digits than its factorization.

33144042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67668 (or 67661 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 33144042421 its reverse (12424044133), we get a palindrome (45568086554).

The spelling of 33144042421 in words is "thirty-three billion, one hundred forty-four million, forty-two thousand, four hundred twenty-one".