40312163 has 4 divisors (see below), whose sum is σ = 40995480. Its totient is φ = 39628848.

The previous prime is 40312141. The next prime is 40312177. The reversal of 40312163 is 36121304.

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 40312163 - 2²⁴ = 23534947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40312193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341570 + ... + 341687.

It is an arithmetic number, because the mean of its divisors is an integer number (10248870).

Almost surely, 2^40312163 is an apocalyptic number.

40312163 is a deficient number, since it is larger than the sum of its proper divisors (683317).

40312163 is an equidigital number, since it uses as much as digits as its factorization.

40312163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683316.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40312163 is about 6349.1860108206. The cubic root of 40312163 is about 342.8825370493.

Adding to 40312163 its reverse (36121304), we get a palindrome (76433467).

The spelling of 40312163 in words is "forty million, three hundred twelve thousand, one hundred sixty-three".