40818213 has 12 divisors (see below), whose sum is σ = 62063040. Its totient is φ = 25779816.

The previous prime is 40818187. The next prime is 40818229. The reversal of 40818213 is 31281804.

It is not a de Polignac number, because 40818213 - 2²⁰ = 39769637 is a prime.

It is a super-2 number, since 2×40818213² = 3332253025026738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40818233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119181 + ... + 119522.

It is an arithmetic number, because the mean of its divisors is an integer number (5171920).

Almost surely, 2^40818213 is an apocalyptic number.

It is an amenable number.

40818213 is a deficient number, since it is larger than the sum of its proper divisors (21244827).

40818213 is a wasteful number, since it uses less digits than its factorization.

40818213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238728 (or 238725 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 40818213 is about 6388.9132878761. The cubic root of 40818213 is about 344.3113420938.

The spelling of 40818213 in words is "forty million, eight hundred eighteen thousand, two hundred thirteen".