40000131 has 24 divisors (see below), whose sum is σ = 59220720. Its totient is φ = 26009856.

The previous prime is 40000123. The next prime is 40000159. The reversal of 40000131 is 13100004.

It is not a de Polignac number, because 40000131 - 2³ = 40000123 is a prime.

It is a super-2 number, since 2×40000131² = 3200020960034322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (40000231) 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 23 ways as a sum of consecutive naturals, for example, 70015 + ... + 70583.

It is an arithmetic number, because the mean of its divisors is an integer number (2467530).

Almost surely, 2^40000131 is an apocalyptic number.

40000131 is a deficient number, since it is larger than the sum of its proper divisors (19220589).

40000131 is a wasteful number, since it uses less digits than its factorization.

40000131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 40000131 is about 6324.5656767876. The cubic root of 40000131 is about 341.9955626797.

Adding to 40000131 its reverse (13100004), we get a palindrome (53100135).

The spelling of 40000131 in words is "forty million, one hundred thirty-one", and thus it is an aban number.