40213305 has 24 divisors (see below), whose sum is σ = 76040640. Its totient is φ = 19497120.

The previous prime is 40213297. The next prime is 40213307. The reversal of 40213305 is 50331204.

It is not a de Polignac number, because 40213305 - 2³ = 40213297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40213307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40125 + ... + 41114.

It is an arithmetic number, because the mean of its divisors is an integer number (3168360).

Almost surely, 2^40213305 is an apocalyptic number.

40213305 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40213305 is a deficient number, since it is larger than the sum of its proper divisors (35827335).

40213305 is a wasteful number, since it uses less digits than its factorization.

40213305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81261 (or 81258 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 40213305 is about 6341.3961396525. The cubic root of 40213305 is about 342.6020226376.

Adding to 40213305 its reverse (50331204), we get a palindrome (90544509).

The spelling of 40213305 in words is "forty million, two hundred thirteen thousand, three hundred five".