40632213 has 4 divisors (see below), whose sum is σ = 54176288. Its totient is φ = 27088140.

The previous prime is 40632209. The next prime is 40632223. The reversal of 40632213 is 31223604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40632213 - 2² = 40632209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40632213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40632223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6772033 + ... + 6772038.

It is an arithmetic number, because the mean of its divisors is an integer number (13544072).

Almost surely, 2^40632213 is an apocalyptic number.

It is an amenable number.

40632213 is a deficient number, since it is larger than the sum of its proper divisors (13544075).

40632213 is a wasteful number, since it uses less digits than its factorization.

40632213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13544074.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 40632213 is about 6374.3402011502. The cubic root of 40632213 is about 343.7875609425.

Adding to 40632213 its reverse (31223604), we get a palindrome (71855817).

The spelling of 40632213 in words is "forty million, six hundred thirty-two thousand, two hundred thirteen".