33381225 has 18 divisors (see below), whose sum is σ = 59789886. Its totient is φ = 17803200.

The previous prime is 33381223. The next prime is 33381241. The reversal of 33381225 is 52218333.

It can be written as a sum of positive squares in 3 ways, for example, as 788544 + 32592681 = 888^2 + 5709^2 .

It is not a de Polignac number, because 33381225 - 2¹ = 33381223 is a prime.

It is a super-2 number, since 2×33381225² = 2228612365001250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33381223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 73956 + ... + 74405.

Almost surely, 2^33381225 is an apocalyptic number.

It is an amenable number.

33381225 is a deficient number, since it is larger than the sum of its proper divisors (26408661).

33381225 is a wasteful number, since it uses less digits than its factorization.

33381225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148377 (or 148369 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 33381225 is about 5777.6487432173. The cubic root of 33381225 is about 321.9838507647.

Adding to 33381225 its reverse (52218333), we get a palindrome (85599558).

The spelling of 33381225 in words is "thirty-three million, three hundred eighty-one thousand, two hundred twenty-five".