40221959 has 2 divisors, whose sum is σ = 40221960. Its totient is φ = 40221958.

The previous prime is 40221953. The next prime is 40221977. The reversal of 40221959 is 95912204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40221953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110979 + 20110980.

It is an arithmetic number, because the mean of its divisors is an integer number (20110980).

Almost surely, 2^40221959 is an apocalyptic number.

40221959 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221959 is an equidigital number, since it uses as much as digits as its factorization.

40221959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40221959 is about 6342.0784448003. The cubic root of 40221959 is about 342.6265971347.

It can be divided in two parts, 4022195 and 9, that added together give a palindrome (4022204).

The spelling of 40221959 in words is "forty million, two hundred twenty-one thousand, nine hundred fifty-nine".