40441213 has 2 divisors, whose sum is σ = 40441214. Its totient is φ = 40441212.

The previous prime is 40441201. The next prime is 40441217. The reversal of 40441213 is 31214404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34550884 + 5890329 = 5878^2 + 2427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40441213 is a prime.

It is a super-2 number, since 2×40441213² = 3270983417822738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40441217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220606 + 20220607.

It is an arithmetic number, because the mean of its divisors is an integer number (20220607).

Almost surely, 2^40441213 is an apocalyptic number.

It is an amenable number.

40441213 is a deficient number, since it is larger than the sum of its proper divisors (1).

40441213 is an equidigital number, since it uses as much as digits as its factorization.

40441213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40441213 is about 6359.3406104721. The cubic root of 40441213 is about 343.2480335009.

Adding to 40441213 its reverse (31214404), we get a palindrome (71655617).

The spelling of 40441213 in words is "forty million, four hundred forty-one thousand, two hundred thirteen".