40318121 has 4 divisors (see below), whose sum is σ = 40919952. Its totient is φ = 39716292.

The previous prime is 40318111. The next prime is 40318183. The reversal of 40318121 is 12181304.

40318121 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40318121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40318093 and 40318102.

It is not an unprimeable number, because it can be changed into a prime (40318111) 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, 300815 + ... + 300948.

It is an arithmetic number, because the mean of its divisors is an integer number (10229988).

Almost surely, 2^40318121 is an apocalyptic number.

It is an amenable number.

40318121 is a deficient number, since it is larger than the sum of its proper divisors (601831).

40318121 is an equidigital number, since it uses as much as digits as its factorization.

40318121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601830.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 40318121 is about 6349.6551874885. The cubic root of 40318121 is about 342.8994285065.

Adding to 40318121 its reverse (12181304), we get a palindrome (52499425).

The spelling of 40318121 in words is "forty million, three hundred eighteen thousand, one hundred twenty-one".