33721249 has 3 divisors (see below), whose sum is σ = 33727057. Its totient is φ = 33715442.

The previous prime is 33721223. The next prime is 33721253. The reversal of 33721249 is 94212733.

The square root of 33721249 is 5807.

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.

It is not a de Polignac number, because 33721249 - 2¹⁵ = 33688481 is a prime.

It is a super-2 number, since 2×33721249² = 2274245268240002, which contains 22 as substring.

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 33721249.

It is not an unprimeable number, because it can be changed into a prime (33721279) 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, 2904 + ... + 8710.

Almost surely, 2^33721249 is an apocalyptic number.

33721249 is the 5807-th square number.

33721249 is the 2904-th centered octagonal number.

It is an amenable number.

33721249 is a deficient number, since it is larger than the sum of its proper divisors (5808).

33721249 is an frugal number, since it uses more digits than its factorization.

33721249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11614 (or 5807 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The cubic root of 33721249 is about 323.0734112837.

The spelling of 33721249 in words is "thirty-three million, seven hundred twenty-one thousand, two hundred forty-nine".