33172157 has 16 divisors (see below), whose sum is σ = 36220800. Its totient is φ = 30274560.

The previous prime is 33172147. The next prime is 33172163. The reversal of 33172157 is 75127133.

It is a cyclic number.

It is not a de Polignac number, because 33172157 - 2⁶ = 33172093 is a prime.

It is a super-2 number, since 2×33172157² = 2200784000065298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33172127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75344 + ... + 75782.

It is an arithmetic number, because the mean of its divisors is an integer number (2263800).

Almost surely, 2^33172157 is an apocalyptic number.

It is an amenable number.

33172157 is a deficient number, since it is larger than the sum of its proper divisors (3048643).

33172157 is a wasteful number, since it uses less digits than its factorization.

33172157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 4410, while the sum is 29.

The square root of 33172157 is about 5759.5274979811. The cubic root of 33172157 is about 321.3102431092.

The spelling of 33172157 in words is "thirty-three million, one hundred seventy-two thousand, one hundred fifty-seven".