33031145 has 24 divisors (see below), whose sum is σ = 47709000. Its totient is φ = 21864192.

The previous prime is 33031133. The next prime is 33031169. The reversal of 33031145 is 54113033.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12201049 + 20830096 = 3493^2 + 4564^2 .

It is not a de Polignac number, because 33031145 - 2⁴ = 33031129 is a prime.

It is a super-2 number, since 2×33031145² = 2182113080022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4781 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (1987875).

Almost surely, 2^33031145 is an apocalyptic number.

33031145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33031145 is a deficient number, since it is larger than the sum of its proper divisors (14677855).

33031145 is a wasteful number, since it uses less digits than its factorization.

33031145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697 (or 4690 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 33031145 is about 5747.2728315263. The cubic root of 33031145 is about 320.8543090051.

Adding to 33031145 its reverse (54113033), we get a palindrome (87144178).

The spelling of 33031145 in words is "thirty-three million, thirty-one thousand, one hundred forty-five".