40213213 has 8 divisors (see below), whose sum is σ = 41825696. Its totient is φ = 38631600.

The previous prime is 40213207. The next prime is 40213219. The reversal of 40213213 is 31231204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40213207) and next prime (40213219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40213213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5043 + ... + 10288.

It is an arithmetic number, because the mean of its divisors is an integer number (5228212).

Almost surely, 2^40213213 is an apocalyptic number.

40213213 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40213213 is a deficient number, since it is larger than the sum of its proper divisors (1612483).

40213213 is a wasteful number, since it uses less digits than its factorization.

40213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40213213 is about 6341.3888857253. The cubic root of 40213213 is about 342.6017613691.

Adding to 40213213 its reverse (31231204), we get a palindrome (71444417).

Subtracting from 40213213 its reverse (31231204), we obtain a square (8982009 = 2997²).

The spelling of 40213213 in words is "forty million, two hundred thirteen thousand, two hundred thirteen".