40131205 has 16 divisors (see below), whose sum is σ = 51876864. Its totient is φ = 29715840.

The previous prime is 40131193. The next prime is 40131209. The reversal of 40131205 is 50213104.

It is not a de Polignac number, because 40131205 - 2²¹ = 38034053 is a prime.

It is a super-2 number, since 2×40131205² = 3221027229504050, 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 (40131209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064 + ... + 9193.

It is an arithmetic number, because the mean of its divisors is an integer number (3242304).

Almost surely, 2^40131205 is an apocalyptic number.

It is an amenable number.

40131205 is a deficient number, since it is larger than the sum of its proper divisors (11745659).

40131205 is a wasteful number, since it uses less digits than its factorization.

40131205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11316.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40131205 is about 6334.9194943582. The cubic root of 40131205 is about 342.3687102243.

Adding to 40131205 its reverse (50213104), we get a palindrome (90344309).

The spelling of 40131205 in words is "forty million, one hundred thirty-one thousand, two hundred five".