40156243 has 4 divisors (see below), whose sum is σ = 40252048. Its totient is φ = 40060440.

The previous prime is 40156223. The next prime is 40156247. The reversal of 40156243 is 34265104.

40156243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40156243 - 2¹⁷ = 40025171 is a prime.

It is a super-2 number, since 2×40156243² = 3225047703750098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40156247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47271 + ... + 48112.

It is an arithmetic number, because the mean of its divisors is an integer number (10063012).

Almost surely, 2^40156243 is an apocalyptic number.

40156243 is a deficient number, since it is larger than the sum of its proper divisors (95805).

40156243 is an equidigital number, since it uses as much as digits as its factorization.

40156243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95804.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40156243 is about 6336.8953754974. The cubic root of 40156243 is about 342.4398971027.

It can be divided in two parts, 401 and 56243, that added together give a square (56644 = 238²).

The spelling of 40156243 in words is "forty million, one hundred fifty-six thousand, two hundred forty-three".