40322143 has 2 divisors, whose sum is σ = 40322144. Its totient is φ = 40322142.

The previous prime is 40322137. The next prime is 40322167. The reversal of 40322143 is 34122304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40322143 is a prime.

It is a super-2 number, since 2×40322143² = 3251750432224898, which contains 22 as substring.

It is equal to p_2452105 and since 40322143 and 2452105 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40322143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40322173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20161071 + 20161072.

It is an arithmetic number, because the mean of its divisors is an integer number (20161072).

Almost surely, 2^40322143 is an apocalyptic number.

40322143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40322143 is an equidigital number, since it uses as much as digits as its factorization.

40322143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40322143 is about 6349.9718897016. The cubic root of 40322143 is about 342.9108302915.

Adding to 40322143 its reverse (34122304), we get a palindrome (74444447).

The spelling of 40322143 in words is "forty million, three hundred twenty-two thousand, one hundred forty-three".