40131197 has 4 divisors (see below), whose sum is σ = 40143936. Its totient is φ = 40118460.

The previous prime is 40131193. The next prime is 40131209. The reversal of 40131197 is 79113104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40131197 - 2² = 40131193 is a prime.

It is a super-2 number, since 2×40131197² = 3221025945305618, 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 (40131193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (10035984).

Almost surely, 2^40131197 is an apocalyptic number.

It is an amenable number.

40131197 is a deficient number, since it is larger than the sum of its proper divisors (12739).

40131197 is an equidigital number, since it uses as much as digits as its factorization.

40131197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12738.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 40131197 is about 6334.9188629374. The cubic root of 40131197 is about 342.3686874743.

The spelling of 40131197 in words is "forty million, one hundred thirty-one thousand, one hundred ninety-seven".