40403213 has 4 divisors (see below), whose sum is σ = 40423008. Its totient is φ = 40383420.

The previous prime is 40403201. The next prime is 40403243. The reversal of 40403213 is 31230404.

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 a cyclic number.

It is not a de Polignac number, because 40403213 - 2⁴ = 40403197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40403191 and 40403200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403243) 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, 6431 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (10105752).

Almost surely, 2^40403213 is an apocalyptic number.

It is an amenable number.

40403213 is a deficient number, since it is larger than the sum of its proper divisors (19795).

40403213 is a wasteful number, since it uses less digits than its factorization.

40403213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19794.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40403213 is about 6356.3521771532. The cubic root of 40403213 is about 343.1404904625.

Adding to 40403213 its reverse (31230404), we get a palindrome (71633617).

The spelling of 40403213 in words is "forty million, four hundred three thousand, two hundred thirteen".