40681533 has 8 divisors (see below), whose sum is σ = 54434848. Its totient is φ = 27024624.

The previous prime is 40681499. The next prime is 40681559. The reversal of 40681533 is 33518604.

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

It is a de Polignac number, because none of the positive numbers 2^k-40681533 is a prime.

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 40681533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40681573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23110 + ... + 24807.

It is an arithmetic number, because the mean of its divisors is an integer number (6804356).

Almost surely, 2^40681533 is an apocalyptic number.

It is an amenable number.

40681533 is a deficient number, since it is larger than the sum of its proper divisors (13753315).

40681533 is a wasteful number, since it uses less digits than its factorization.

40681533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48203.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40681533 is about 6378.2076635995. The cubic root of 40681533 is about 343.9266028959.

It can be divided in two parts, 40681 and 533, that added together give a palindrome (41214).

The spelling of 40681533 in words is "forty million, six hundred eighty-one thousand, five hundred thirty-three".