40106181 has 32 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 24563264.

The previous prime is 40106177. The next prime is 40106189. The reversal of 40106181 is 18160104.

It is not a de Polignac number, because 40106181 - 2² = 40106177 is a prime.

It is a super-2 number, since 2×40106181² = 3217011508809522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40106189) 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, 269095 + ... + 269243.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^40106181 is an apocalyptic number.

It is an amenable number.

40106181 is a deficient number, since it is larger than the sum of its proper divisors (17954619).

40106181 is a wasteful number, since it uses less digits than its factorization.

40106181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 40106181 is about 6332.9441020745. The cubic root of 40106181 is about 342.2975335595.

Adding to 40106181 its reverse (18160104), we get a palindrome (58266285).

The spelling of 40106181 in words is "forty million, one hundred six thousand, one hundred eighty-one".