40207131 has 8 divisors (see below), whose sum is σ = 59566160. Its totient is φ = 26804736.

The previous prime is 40207127. The next prime is 40207147. The reversal of 40207131 is 13170204.

It is not a de Polignac number, because 40207131 - 2² = 40207127 is a prime.

It is a super-2 number, since 2×40207131² = 3233226766502322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40207331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744550 + ... + 744603.

It is an arithmetic number, because the mean of its divisors is an integer number (7445770).

Almost surely, 2^40207131 is an apocalyptic number.

40207131 is a deficient number, since it is larger than the sum of its proper divisors (19359029).

40207131 is a wasteful number, since it uses less digits than its factorization.

40207131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489162 (or 1489156 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40207131 is about 6340.9093196481. The cubic root of 40207131 is about 342.5844883650.

Adding to 40207131 its reverse (13170204), we get a palindrome (53377335).

The spelling of 40207131 in words is "forty million, two hundred seven thousand, one hundred thirty-one".