33172705 has 8 divisors (see below), whose sum is σ = 40401792. Its totient is φ = 26141808.

The previous prime is 33172673. The next prime is 33172709. The reversal of 33172705 is 50727133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33172705 - 2⁵ = 33172673 is a prime.

It is a super-2 number, since 2×33172705² = 2200856714034050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33172709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49177 + ... + 49846.

It is an arithmetic number, because the mean of its divisors is an integer number (5050224).

Almost surely, 2^33172705 is an apocalyptic number.

It is an amenable number.

33172705 is a deficient number, since it is larger than the sum of its proper divisors (7229087).

33172705 is an equidigital number, since it uses as much as digits as its factorization.

33172705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99095.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 33172705 is about 5759.5750711316. The cubic root of 33172705 is about 321.3120124348.

Adding to 33172705 its reverse (50727133), we get a palindrome (83899838).

The spelling of 33172705 in words is "thirty-three million, one hundred seventy-two thousand, seven hundred five".