40306161 has 8 divisors (see below), whose sum is σ = 61418944. Its totient is φ = 23032080.

The previous prime is 40306141. The next prime is 40306181. The reversal of 40306161 is 16160304.

40306161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40306141) and next prime (40306181).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40306161 - 2⁷ = 40306033 is a prime.

It is a super-2 number, since 2×40306161² = 3249173229115842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1919341 = 40306161 / (4 + 0 + 3 + 0 + 6 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40306121) 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 7 ways as a sum of consecutive naturals, for example, 959650 + ... + 959691.

It is an arithmetic number, because the mean of its divisors is an integer number (7677368).

Almost surely, 2^40306161 is an apocalyptic number.

It is an amenable number.

40306161 is a deficient number, since it is larger than the sum of its proper divisors (21112783).

40306161 is a wasteful number, since it uses less digits than its factorization.

40306161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919351.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40306161 is about 6348.7133342119. The cubic root of 40306161 is about 342.8655191654.

Adding to 40306161 its reverse (16160304), we get a palindrome (56466465).

The spelling of 40306161 in words is "forty million, three hundred six thousand, one hundred sixty-one".