40221343 has 2 divisors, whose sum is σ = 40221344. Its totient is φ = 40221342.

The previous prime is 40221301. The next prime is 40221361. The reversal of 40221343 is 34312204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40221343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40221443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110671 + 20110672.

It is an arithmetic number, because the mean of its divisors is an integer number (20110672).

Almost surely, 2^40221343 is an apocalyptic number.

40221343 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221343 is an equidigital number, since it uses as much as digits as its factorization.

40221343 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 40221343 is about 6342.0298800936. The cubic root of 40221343 is about 342.6248480150.

Adding to 40221343 its reverse (34312204), we get a palindrome (74533547).

The spelling of 40221343 in words is "forty million, two hundred twenty-one thousand, three hundred forty-three".