40475881 has 2 divisors, whose sum is σ = 40475882. Its totient is φ = 40475880.

The previous prime is 40475873. The next prime is 40475921. The reversal of 40475881 is 18857404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39803481 + 672400 = 6309^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 40475881 - 2³ = 40475873 is a prime.

It is a super-2 number, since 2×40475881² = 3276593885452322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40475881.

It is not a weakly prime, because it can be changed into another prime (40475821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20237940 + 20237941.

It is an arithmetic number, because the mean of its divisors is an integer number (20237941).

Almost surely, 2^40475881 is an apocalyptic number.

It is an amenable number.

40475881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40475881 is an equidigital number, since it uses as much as digits as its factorization.

40475881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 40475881 is about 6362.0657808608. The cubic root of 40475881 is about 343.3460879626.

The spelling of 40475881 in words is "forty million, four hundred seventy-five thousand, eight hundred eighty-one".