33242552521 has 4 divisors (see below), whose sum is σ = 33245831700. Its totient is φ = 33239273344.

The previous prime is 33242552509. The next prime is 33242552537. The reversal of 33242552521 is 12525524233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12525524233 = 38611 ⋅324403.

It can be written as a sum of positive squares in 2 ways, for example, as 24347233296 + 8895319225 = 156036^2 + 94315^2 .

It is a cyclic number.

It is not a de Polignac number, because 33242552521 - 2⁷ = 33242552393 is a prime.

It is a super-2 number, since 2×33242552521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33242552501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624336 + ... + 1644673.

It is an arithmetic number, because the mean of its divisors is an integer number (8311457925).

Almost surely, 2^33242552521 is an apocalyptic number.

It is an amenable number.

33242552521 is a deficient number, since it is larger than the sum of its proper divisors (3279179).

33242552521 is a wasteful number, since it uses less digits than its factorization.

33242552521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279178.

The product of its digits is 72000, while the sum is 34.

The spelling of 33242552521 in words is "thirty-three billion, two hundred forty-two million, five hundred fifty-two thousand, five hundred twenty-one".