33231772 has 24 divisors (see below), whose sum is σ = 68261984. Its totient is φ = 13856832.

The previous prime is 33231769. The next prime is 33231791. The reversal of 33231772 is 27713233.

It is a super-2 number, since 2×33231772² = 2208701340519968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 33231772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15003 + ... + 17074.

Almost surely, 2^33231772 is an apocalyptic number.

It is an amenable number.

33231772 is an abundant number, since it is smaller than the sum of its proper divisors (35030212).

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

33231772 is a wasteful number, since it uses less digits than its factorization.

33231772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32125 (or 32123 counting only the distinct ones).

The product of its digits is 5292, while the sum is 28.

The square root of 33231772 is about 5764.7005126025. The cubic root of 33231772 is about 321.5026077168.

The spelling of 33231772 in words is "thirty-three million, two hundred thirty-one thousand, seven hundred seventy-two".