40613213 has 2 divisors, whose sum is σ = 40613214. Its totient is φ = 40613212.

The previous prime is 40613201. The next prime is 40613233. The reversal of 40613213 is 31231604.

It is an a-pointer prime, because the next prime (40613233) can be obtained adding 40613213 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26759929 + 13853284 = 5173^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 40613213 - 2¹⁰ = 40612189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40613233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20306606 + 20306607.

It is an arithmetic number, because the mean of its divisors is an integer number (20306607).

Almost surely, 2^40613213 is an apocalyptic number.

It is an amenable number.

40613213 is a deficient number, since it is larger than the sum of its proper divisors (1).

40613213 is an equidigital number, since it uses as much as digits as its factorization.

40613213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40613213 is about 6372.8496765576. The cubic root of 40613213 is about 343.7339665029.

Adding to 40613213 its reverse (31231604), we get a palindrome (71844817).

The spelling of 40613213 in words is "forty million, six hundred thirteen thousand, two hundred thirteen".