33145530 has 96 divisors (see below), whose sum is σ = 91469952. Its totient is φ = 7666560.

The previous prime is 33145517. The next prime is 33145531. The reversal of 33145530 is 3554133.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 33145530.

It is not an unprimeable number, because it can be changed into a prime (33145531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83292 + ... + 83688.

It is an arithmetic number, because the mean of its divisors is an integer number (952812).

Almost surely, 2^33145530 is an apocalyptic number.

33145530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 33145530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45734976).

33145530 is an abundant number, since it is smaller than the sum of its proper divisors (58324422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33145530 is a wasteful number, since it uses less digits than its factorization.

33145530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 33145530 is about 5757.2154727785. The cubic root of 33145530 is about 321.2242491232.

Adding to 33145530 its reverse (3554133), we get a palindrome (36699663).

The spelling of 33145530 in words is "thirty-three million, one hundred forty-five thousand, five hundred thirty".