33993081 has 32 divisors (see below), whose sum is σ = 55065600. Its totient is φ = 20632320.

The previous prime is 33993049. The next prime is 33993083. The reversal of 33993081 is 18039933.

It is not a de Polignac number, because 33993081 - 2⁵ = 33993049 is a prime.

It is a super-2 number, since 2×33993081² = 2311059111745122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33993083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13035 + ... + 15423.

It is an arithmetic number, because the mean of its divisors is an integer number (1720800).

Almost surely, 2^33993081 is an apocalyptic number.

33993081 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33993081 is a deficient number, since it is larger than the sum of its proper divisors (21072519).

33993081 is a wasteful number, since it uses less digits than its factorization.

33993081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 33993081 is about 5830.3585653028. The cubic root of 33993081 is about 323.9392032702.

The spelling of 33993081 in words is "thirty-three million, nine hundred ninety-three thousand, eighty-one".