33145472 has 16 divisors (see below), whose sum is σ = 66032250. Its totient is φ = 16572672.

The previous prime is 33145471. The next prime is 33145487. The reversal of 33145472 is 27454133.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24049216 + 9096256 = 4904^2 + 3016^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (33145471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129347 + ... + 129602.

Almost surely, 2^33145472 is an apocalyptic number.

33145472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33145472 is a deficient number, since it is larger than the sum of its proper divisors (32886778).

33145472 is an equidigital number, since it uses as much as digits as its factorization.

33145472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258963 (or 258951 counting only the distinct ones).

The product of its digits is 10080, while the sum is 29.

The square root of 33145472 is about 5757.2104356190. The cubic root of 33145472 is about 321.2240617573.

The spelling of 33145472 in words is "thirty-three million, one hundred forty-five thousand, four hundred seventy-two".