33220525 has 12 divisors (see below), whose sum is σ = 44362612. Its totient is φ = 24531840.

The previous prime is 33220519. The next prime is 33220549. The reversal of 33220525 is 52502233.

It can be written as a sum of positive squares in 6 ways, for example, as 2184484 + 31036041 = 1478^2 + 5571^2 .

It is not a de Polignac number, because 33220525 - 2⁹ = 33220013 is a prime.

It is a super-2 number, since 2×33220525² = 2207206562551250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33220496 and 33220505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50784 + ... + 51433.

Almost surely, 2^33220525 is an apocalyptic number.

It is an amenable number.

33220525 is a deficient number, since it is larger than the sum of its proper divisors (11142087).

33220525 is a wasteful number, since it uses less digits than its factorization.

33220525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102240 (or 102235 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 33220525 is about 5763.7249240400. The cubic root of 33220525 is about 321.4663337174.

Adding to 33220525 its reverse (52502233), we get a palindrome (85722758).

The spelling of 33220525 in words is "thirty-three million, two hundred twenty thousand, five hundred twenty-five".