40330421 has 2 divisors, whose sum is σ = 40330422. Its totient is φ = 40330420.

The previous prime is 40330417. The next prime is 40330427. The reversal of 40330421 is 12403304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 7921 = 6350^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 40330421 - 2² = 40330417 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40330421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40330427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20165210 + 20165211.

It is an arithmetic number, because the mean of its divisors is an integer number (20165211).

Almost surely, 2^40330421 is an apocalyptic number.

It is an amenable number.

40330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40330421 is an equidigital number, since it uses as much as digits as its factorization.

40330421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40330421 is about 6350.6236701603. The cubic root of 40330421 is about 342.9342948316.

Adding to 40330421 its reverse (12403304), we get a palindrome (52733725).

The spelling of 40330421 in words is "forty million, three hundred thirty thousand, four hundred twenty-one".