33250981 has 4 divisors (see below), whose sum is σ = 33878412. Its totient is φ = 32623552.

The previous prime is 33250979. The next prime is 33251027. The reversal of 33250981 is 18905233.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18905233 = 47 ⋅402239.

It can be written as a sum of positive squares in 2 ways, for example, as 24304900 + 8946081 = 4930^2 + 2991^2 .

It is a cyclic number.

It is not a de Polignac number, because 33250981 - 2¹ = 33250979 is a prime.

It is a super-2 number, since 2×33250981² = 2211255474924722, 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 (33250951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313636 + ... + 313741.

It is an arithmetic number, because the mean of its divisors is an integer number (8469603).

Almost surely, 2^33250981 is an apocalyptic number.

It is an amenable number.

33250981 is a deficient number, since it is larger than the sum of its proper divisors (627431).

33250981 is an equidigital number, since it uses as much as digits as its factorization.

33250981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627430.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 33250981 is about 5766.3663601960. The cubic root of 33250981 is about 321.5645419611.

The spelling of 33250981 in words is "thirty-three million, two hundred fifty thousand, nine hundred eighty-one".