33290145 has 24 divisors (see below), whose sum is σ = 65946816. Its totient is φ = 15218208.

The previous prime is 33290143. The next prime is 33290149. The reversal of 33290145 is 54109233.

It is not a de Polignac number, because 33290145 - 2¹ = 33290143 is a prime.

It is a super-2 number, since 2×33290145² = 2216467508242050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33290141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52527 + ... + 53156.

It is an arithmetic number, because the mean of its divisors is an integer number (2747784).

Almost surely, 2^33290145 is an apocalyptic number.

33290145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33290145 is a deficient number, since it is larger than the sum of its proper divisors (32656671).

33290145 is a wasteful number, since it uses less digits than its factorization.

33290145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105701 (or 105698 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 33290145 is about 5769.7612602256. The cubic root of 33290145 is about 321.6907418720.

Adding to 33290145 its reverse (54109233), we get a palindrome (87399378).

The spelling of 33290145 in words is "thirty-three million, two hundred ninety thousand, one hundred forty-five".