40213345 has 4 divisors (see below), whose sum is σ = 48256020. Its totient is φ = 32170672.

The previous prime is 40213337. The next prime is 40213351. The reversal of 40213345 is 54331204.

40213345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11128896 + 29084449 = 3336^2 + 5393^2 .

It is a cyclic number.

It is not a de Polignac number, because 40213345 - 2³ = 40213337 is a prime.

It is a super-2 number, since 2×40213345² = 3234226232178050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4021330 + ... + 4021339.

It is an arithmetic number, because the mean of its divisors is an integer number (12064005).

Almost surely, 2^40213345 is an apocalyptic number.

It is an amenable number.

40213345 is a deficient number, since it is larger than the sum of its proper divisors (8042675).

40213345 is an equidigital number, since it uses as much as digits as its factorization.

40213345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8042674.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40213345 is about 6341.3992935314. The cubic root of 40213345 is about 342.6021362324.

Adding to 40213345 its reverse (54331204), we get a palindrome (94544549).

The spelling of 40213345 in words is "forty million, two hundred thirteen thousand, three hundred forty-five".