40775581 has 16 divisors (see below), whose sum is σ = 51147648. Its totient is φ = 31579200.

The previous prime is 40775563. The next prime is 40775593. The reversal of 40775581 is 18557704.

It is a cyclic number.

It is not a de Polignac number, because 40775581 - 2⁹ = 40775069 is a prime.

It is a super-2 number, since 2×40775581² = 3325296011775122, 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 40775581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40775531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11791 + ... + 14851.

It is an arithmetic number, because the mean of its divisors is an integer number (3196728).

Almost surely, 2^40775581 is an apocalyptic number.

It is an amenable number.

40775581 is a deficient number, since it is larger than the sum of its proper divisors (10372067).

40775581 is a wasteful number, since it uses less digits than its factorization.

40775581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 40775581 is about 6385.5760116062. The cubic root of 40775581 is about 344.1914299816.

The spelling of 40775581 in words is "forty million, seven hundred seventy-five thousand, five hundred eighty-one".