33538216 has 8 divisors (see below), whose sum is σ = 62884170. Its totient is φ = 16769104.

The previous prime is 33538207. The next prime is 33538217. The reversal of 33538216 is 61283533.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 2735716 = 5550^2 + 1654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×33538216² = 2249623864925312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33538217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2096131 + ... + 2096146.

Almost surely, 2^33538216 is an apocalyptic number.

It is an amenable number.

33538216 is a deficient number, since it is larger than the sum of its proper divisors (29345954).

33538216 is a wasteful number, since it uses less digits than its factorization.

33538216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192283 (or 4192279 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 33538216 is about 5791.2188699789. The cubic root of 33538216 is about 322.4878219867.

The spelling of 33538216 in words is "thirty-three million, five hundred thirty-eight thousand, two hundred sixteen".