42733981 has 8 divisors (see below), whose sum is σ = 43732224. Its totient is φ = 41747040.

The previous prime is 42733969. The next prime is 42733993. The reversal of 42733981 is 18933724.

It is an interprime number because it is at equal distance from previous prime (42733969) and next prime (42733993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42733981 - 2⁵ = 42733949 is a prime.

It is a super-2 number, since 2×42733981² = 3652386264216722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42733981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42733921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5076 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (5466528).

Almost surely, 2^42733981 is an apocalyptic number.

It is an amenable number.

42733981 is a deficient number, since it is larger than the sum of its proper divisors (998243).

42733981 is a wasteful number, since it uses less digits than its factorization.

42733981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651.

The product of its digits is 36288, while the sum is 37.

The square root of 42733981 is about 6537.1232969862. The cubic root of 42733981 is about 349.6158533595.

The spelling of 42733981 in words is "forty-two million, seven hundred thirty-three thousand, nine hundred eighty-one".