40850581 has 4 divisors (see below), whose sum is σ = 41410252. Its totient is φ = 40290912.

The previous prime is 40850549. The next prime is 40850603. The reversal of 40850581 is 18505804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17724100 + 23126481 = 4210^2 + 4809^2 .

It is a cyclic number.

It is not a de Polignac number, because 40850581 - 2⁵ = 40850549 is a prime.

It is a super-2 number, since 2×40850581² = 3337539936075122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40850681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279726 + ... + 279871.

It is an arithmetic number, because the mean of its divisors is an integer number (10352563).

Almost surely, 2^40850581 is an apocalyptic number.

It is an amenable number.

40850581 is a deficient number, since it is larger than the sum of its proper divisors (559671).

40850581 is an equidigital number, since it uses as much as digits as its factorization.

40850581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559670.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 40850581 is about 6391.4459240457. The cubic root of 40850581 is about 344.4023286426.

The spelling of 40850581 in words is "forty million, eight hundred fifty thousand, five hundred eighty-one".