33881481 has 12 divisors (see below), whose sum is σ = 50519040. Its totient is φ = 21858840.

The previous prime is 33881479. The next prime is 33881489. The reversal of 33881481 is 18418833.

It is not a de Polignac number, because 33881481 - 2¹ = 33881479 is a prime.

It is a super-2 number, since 2×33881481² = 2295909509506722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33881489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60441 + ... + 60998.

It is an arithmetic number, because the mean of its divisors is an integer number (4209920).

Almost surely, 2^33881481 is an apocalyptic number.

33881481 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33881481 is a deficient number, since it is larger than the sum of its proper divisors (16637559).

33881481 is a wasteful number, since it uses less digits than its factorization.

33881481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121476 (or 121473 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 33881481 is about 5820.7801023574. The cubic root of 33881481 is about 323.5843148781.

The spelling of 33881481 in words is "thirty-three million, eight hundred eighty-one thousand, four hundred eighty-one".