40142213 has 2 divisors, whose sum is σ = 40142214. Its totient is φ = 40142212.

The previous prime is 40142197. The next prime is 40142251. The reversal of 40142213 is 31224104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 18258529 = 4678^2 + 4273^2 .

It is a cyclic number.

It is not a de Polignac number, because 40142213 - 2⁴ = 40142197 is a prime.

It is a super-2 number, since 2×40142213² = 3222794529074738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40142191 and 40142200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40142413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071106 + 20071107.

It is an arithmetic number, because the mean of its divisors is an integer number (20071107).

Almost surely, 2^40142213 is an apocalyptic number.

It is an amenable number.

40142213 is a deficient number, since it is larger than the sum of its proper divisors (1).

40142213 is an equidigital number, since it uses as much as digits as its factorization.

40142213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40142213 is about 6335.7882698209. The cubic root of 40142213 is about 342.4000113047.

Adding to 40142213 its reverse (31224104), we get a palindrome (71366317).

The spelling of 40142213 in words is "forty million, one hundred forty-two thousand, two hundred thirteen".