40242213 has 24 divisors (see below), whose sum is σ = 67144896. Its totient is φ = 22953600.

The previous prime is 40242187. The next prime is 40242217. The reversal of 40242213 is 31224204.

It is not a de Polignac number, because 40242213 - 2¹⁶ = 40176677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10273 + ... + 13638.

It is an arithmetic number, because the mean of its divisors is an integer number (2797704).

Almost surely, 2^40242213 is an apocalyptic number.

It is an amenable number.

40242213 is a deficient number, since it is larger than the sum of its proper divisors (26902683).

40242213 is a wasteful number, since it uses less digits than its factorization.

40242213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23945 (or 23942 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40242213 is about 6343.6750389660. The cubic root of 40242213 is about 342.6840980188.

Adding to 40242213 its reverse (31224204), we get a palindrome (71466417).

Subtracting from 40242213 its reverse (31224204), we obtain a square (9018009 = 3003²).

The spelling of 40242213 in words is "forty million, two hundred forty-two thousand, two hundred thirteen".