33045021 has 6 divisors (see below), whose sum is σ = 47731710. Its totient is φ = 22030008.

The previous prime is 33045017. The next prime is 33045029. The reversal of 33045021 is 12054033.

It can be written as a sum of positive squares in only one way, i.e., 32936121 + 108900 = 5739^2 + 330^2 .

It is not a de Polignac number, because 33045021 - 2² = 33045017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33044985 and 33045003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33045029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1835826 + ... + 1835843.

It is an arithmetic number, because the mean of its divisors is an integer number (7955285).

Almost surely, 2^33045021 is an apocalyptic number.

It is an amenable number.

33045021 is a deficient number, since it is larger than the sum of its proper divisors (14686689).

33045021 is a wasteful number, since it uses less digits than its factorization.

33045021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671675 (or 3671672 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 33045021 is about 5748.4798860220. The cubic root of 33045021 is about 320.8992317702.

Adding to 33045021 its reverse (12054033), we get a palindrome (45099054).

The spelling of 33045021 in words is "thirty-three million, forty-five thousand, twenty-one".