40131099 has 32 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 25536672.

The previous prime is 40131071. The next prime is 40131109. The reversal of 40131099 is 99013104.

It is not a de Polignac number, because 40131099 - 2⁸ = 40130843 is a prime.

It is a super-2 number, since 2×40131099² = 3221010213895602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40131029) 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, 83542 + ... + 84020.

It is an arithmetic number, because the mean of its divisors is an integer number (1944000).

Almost surely, 2^40131099 is an apocalyptic number.

40131099 is a deficient number, since it is larger than the sum of its proper divisors (22076901).

40131099 is a wasteful number, since it uses less digits than its factorization.

40131099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 40131099 is about 6334.9111280270. The cubic root of 40131099 is about 342.3684087871.

The spelling of 40131099 in words is "forty million, one hundred thirty-one thousand, ninety-nine".