40013331 has 4 divisors (see below), whose sum is σ = 53351112. Its totient is φ = 26675552.

The previous prime is 40013329. The next prime is 40013333. The reversal of 40013331 is 13331004.

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

It is an interprime number because it is at equal distance from previous prime (40013329) and next prime (40013333).

It is a cyclic number.

It is not a de Polignac number, because 40013331 - 2¹ = 40013329 is a prime.

It is a super-2 number, since 2×40013331² = 3202133315431122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40013331.

It is not an unprimeable number, because it can be changed into a prime (40013333) 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 3 ways as a sum of consecutive naturals, for example, 6668886 + ... + 6668891.

It is an arithmetic number, because the mean of its divisors is an integer number (13337778).

Almost surely, 2^40013331 is an apocalyptic number.

40013331 is a deficient number, since it is larger than the sum of its proper divisors (13337781).

40013331 is a wasteful number, since it uses less digits than its factorization.

40013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13337780.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 40013331 is about 6325.6091406283. The cubic root of 40013331 is about 342.0331779310.

Adding to 40013331 its reverse (13331004), we get a palindrome (53344335).

It can be divided in two parts, 400 and 13331, that added together give a palindrome (13731).

The spelling of 40013331 in words is "forty million, thirteen thousand, three hundred thirty-one".