33097981 has 24 divisors (see below), whose sum is σ = 41167680. Its totient is φ = 26453952.

The previous prime is 33097979. The next prime is 33097991. The reversal of 33097981 is 18979033.

It is not a de Polignac number, because 33097981 - 2¹ = 33097979 is a prime.

It is a super-2 number, since 2×33097981² = 2190952692552722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33097921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67720 + ... + 68206.

It is an arithmetic number, because the mean of its divisors is an integer number (1715320).

Almost surely, 2^33097981 is an apocalyptic number.

It is an amenable number.

33097981 is a deficient number, since it is larger than the sum of its proper divisors (8069699).

33097981 is a wasteful number, since it uses less digits than its factorization.

33097981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 33097981 is about 5753.0844770436. The cubic root of 33097981 is about 321.0705712730.

The spelling of 33097981 in words is "thirty-three million, ninety-seven thousand, nine hundred eighty-one".