40933581 has 32 divisors (see below), whose sum is σ = 63584640. Its totient is φ = 23203584.

The previous prime is 40933579. The next prime is 40933591. The reversal of 40933581 is 18533904.

It is not a de Polignac number, because 40933581 - 2¹ = 40933579 is a prime.

It is a super-2 number, since 2×40933581² = 3351116106967122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40933561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26671 + ... + 28163.

It is an arithmetic number, because the mean of its divisors is an integer number (1987020).

Almost surely, 2^40933581 is an apocalyptic number.

It is an amenable number.

40933581 is a deficient number, since it is larger than the sum of its proper divisors (22651059).

40933581 is a wasteful number, since it uses less digits than its factorization.

40933581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 40933581 is about 6397.9356827027. The cubic root of 40933581 is about 344.6354224731.

It can be divided in two parts, 40933 and 581, that added together give a palindrome (41514).

The spelling of 40933581 in words is "forty million, nine hundred thirty-three thousand, five hundred eighty-one".