40157185 has 4 divisors (see below), whose sum is σ = 48188628. Its totient is φ = 32125744.

The previous prime is 40157147. The next prime is 40157189. The reversal of 40157185 is 58175104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9199089 + 30958096 = 3033^2 + 5564^2 .

It is a cyclic number.

It is not a de Polignac number, because 40157185 - 2⁹ = 40156673 is a prime.

It is a super-2 number, since 2×40157185² = 3225199014248450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40157189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4015714 + ... + 4015723.

It is an arithmetic number, because the mean of its divisors is an integer number (12047157).

It is a Proth number, since it is equal to 2451 ⋅ 2¹⁴ + 1 and 2451 < 2¹⁴.

Almost surely, 2^40157185 is an apocalyptic number.

It is an amenable number.

40157185 is a deficient number, since it is larger than the sum of its proper divisors (8031443).

40157185 is an equidigital number, since it uses as much as digits as its factorization.

40157185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031442.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 40157185 is about 6336.9697016792. The cubic root of 40157185 is about 342.4425747757.

The spelling of 40157185 in words is "forty million, one hundred fifty-seven thousand, one hundred eighty-five".