40881313 has 4 divisors (see below), whose sum is σ = 44597808. Its totient is φ = 37164820.

The previous prime is 40881299. The next prime is 40881317. The reversal of 40881313 is 31318804.

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 de Polignac number, because none of the positive numbers 2^k-40881313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40881317) 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, 1858231 + ... + 1858252.

It is an arithmetic number, because the mean of its divisors is an integer number (11149452).

Almost surely, 2^40881313 is an apocalyptic number.

It is an amenable number.

40881313 is a deficient number, since it is larger than the sum of its proper divisors (3716495).

40881313 is a wasteful number, since it uses less digits than its factorization.

40881313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716494.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 40881313 is about 6393.8496228798. The cubic root of 40881313 is about 344.4886719213.

The spelling of 40881313 in words is "forty million, eight hundred eighty-one thousand, three hundred thirteen".