40533681 has 8 divisors (see below), whose sum is σ = 54602464. Its totient is φ = 26743680.

The previous prime is 40533653. The next prime is 40533697. The reversal of 40533681 is 18633504.

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

It is not a de Polignac number, because 40533681 - 2⁶ = 40533617 is a prime.

It is a super-2 number, since 2×40533681² = 3285958590819522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40533781) 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, 69355 + ... + 69936.

It is an arithmetic number, because the mean of its divisors is an integer number (6825308).

Almost surely, 2^40533681 is an apocalyptic number.

It is an amenable number.

40533681 is a deficient number, since it is larger than the sum of its proper divisors (14068783).

40533681 is a wasteful number, since it uses less digits than its factorization.

40533681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139391.

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

The square root of 40533681 is about 6366.6067100144. The cubic root of 40533681 is about 343.5094442166.

It can be divided in two parts, 40533 and 681, that added together give a palindrome (41214).

The spelling of 40533681 in words is "forty million, five hundred thirty-three thousand, six hundred eighty-one".