40221213 has 8 divisors (see below), whose sum is σ = 53851776. Its totient is φ = 26702400.

The previous prime is 40221199. The next prime is 40221221. The reversal of 40221213 is 31212204.

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

It is not a de Polignac number, because 40221213 - 2¹³ = 40213021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40221192 and 40221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221253) 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, 27093 + ... + 28538.

It is an arithmetic number, because the mean of its divisors is an integer number (6731472).

Almost surely, 2^40221213 is an apocalyptic number.

It is an amenable number.

40221213 is a deficient number, since it is larger than the sum of its proper divisors (13630563).

40221213 is a wasteful number, since it uses less digits than its factorization.

40221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55875.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40221213 is about 6342.0196310008. The cubic root of 40221213 is about 342.6244788803.

Adding to 40221213 its reverse (31212204), we get a palindrome (71433417).

Subtracting from 40221213 its reverse (31212204), we obtain a palindrome (9009009).

The spelling of 40221213 in words is "forty million, two hundred twenty-one thousand, two hundred thirteen".