33047240521 has 3 divisors (see below), whose sum is σ = 33047422311. Its totient is φ = 33047058732.

The previous prime is 33047240509. The next prime is 33047240549. The reversal of 33047240521 is 12504274033.

It is a happy number.

The square root of 33047240521 is 181789.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12504274033 = 2731 ⋅4578643.

It can be written as a sum of positive squares in only one way, i.e., 23842756921 + 9204483600 = 154411^2 + 95940^2 .

It is not a de Polignac number, because 33047240521 - 2¹⁹ = 33046716233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33047240021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 90895 + ... + 272683.

It is an arithmetic number, because the mean of its divisors is an integer number (11015807437).

Almost surely, 2^33047240521 is an apocalyptic number.

33047240521 is the 181789-th square number.

33047240521 is the 90895-th centered octagonal number.

It is an amenable number.

33047240521 is a deficient number, since it is larger than the sum of its proper divisors (181790).

33047240521 is an frugal number, since it uses more digits than its factorization.

33047240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363578 (or 181789 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The spelling of 33047240521 in words is "thirty-three billion, forty-seven million, two hundred forty thousand, five hundred twenty-one".