32991133 has 16 divisors (see below), whose sum is σ = 38822400. Its totient is φ = 27449856.

The previous prime is 32991103. The next prime is 32991137. The reversal of 32991133 is 33119923.

It is a de Polignac number, because none of the positive numbers 2^k-32991133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32991095 and 32991104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32991137) 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, 48685 + ... + 49357.

It is an arithmetic number, because the mean of its divisors is an integer number (2426400).

Almost surely, 2^32991133 is an apocalyptic number.

It is an amenable number.

32991133 is a deficient number, since it is larger than the sum of its proper divisors (5831267).

32991133 is a wasteful number, since it uses less digits than its factorization.

32991133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its digits is 4374, while the sum is 31.

The square root of 32991133 is about 5743.7908214001. The cubic root of 32991133 is about 320.7247019343.

It can be divided in two parts, 32991 and 133, that added together give a square (33124 = 182²).

The spelling of 32991133 in words is "thirty-two million, nine hundred ninety-one thousand, one hundred thirty-three".