40293161 has 4 divisors (see below), whose sum is σ = 40341252. Its totient is φ = 40245072.

The previous prime is 40293157. The next prime is 40293191. The reversal of 40293161 is 16139204.

40293161 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 can be written as a sum of positive squares in 2 ways, for example, as 1155625 + 39137536 = 1075^2 + 6256^2 .

It is a cyclic number.

It is not a de Polignac number, because 40293161 - 2² = 40293157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40293161.

It is not an unprimeable number, because it can be changed into a prime (40293101) 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, 22766 + ... + 24471.

It is an arithmetic number, because the mean of its divisors is an integer number (10085313).

Almost surely, 2^40293161 is an apocalyptic number.

It is an amenable number.

40293161 is a deficient number, since it is larger than the sum of its proper divisors (48091).

40293161 is an equidigital number, since it uses as much as digits as its factorization.

40293161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48090.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 40293161 is about 6347.6894221441. The cubic root of 40293161 is about 342.8286535769.

The spelling of 40293161 in words is "forty million, two hundred ninety-three thousand, one hundred sixty-one".