40051305 has 48 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 17956224.

The previous prime is 40051289. The next prime is 40051307. The reversal of 40051305 is 50315004.

It is not a de Polignac number, because 40051305 - 2⁴ = 40051289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40051307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15496 + ... + 17894.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^40051305 is an apocalyptic number.

40051305 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40051305 is an abundant number, since it is smaller than the sum of its proper divisors (40819095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40051305 is a wasteful number, since it uses less digits than its factorization.

40051305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 40051305 is about 6328.6100369670. The cubic root of 40051305 is about 342.1413440591.

Adding to 40051305 its reverse (50315004), we get a palindrome (90366309).

The spelling of 40051305 in words is "forty million, fifty-one thousand, three hundred five".