33145425 has 36 divisors (see below), whose sum is σ = 60832044. Its totient is φ = 17241600.

The previous prime is 33145423. The next prime is 33145429. The reversal of 33145425 is 52454133.

It can be written as a sum of positive squares in 6 ways, for example, as 8105409 + 25040016 = 2847^2 + 5004^2 .

It is not a de Polignac number, because 33145425 - 2¹ = 33145423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (33145421) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 7429 + ... + 11021.

It is an arithmetic number, because the mean of its divisors is an integer number (1689779).

Almost surely, 2^33145425 is an apocalyptic number.

It is an amenable number.

33145425 is a deficient number, since it is larger than the sum of its proper divisors (27686619).

33145425 is a wasteful number, since it uses less digits than its factorization.

33145425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650 (or 3642 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 33145425 is about 5757.2063537796. The cubic root of 33145425 is about 321.2239099263.

Adding to 33145425 its reverse (52454133), we get a palindrome (85599558).

The spelling of 33145425 in words is "thirty-three million, one hundred forty-five thousand, four hundred twenty-five".