40315643 has 8 divisors (see below), whose sum is σ = 40772160. Its totient is φ = 39861640.

The previous prime is 40315631. The next prime is 40315657. The reversal of 40315643 is 34651304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40315643 - 2⁶ = 40315579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40315543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60848 + ... + 61506.

It is an arithmetic number, because the mean of its divisors is an integer number (5096520).

Almost surely, 2^40315643 is an apocalyptic number.

40315643 is a deficient number, since it is larger than the sum of its proper divisors (456517).

40315643 is a wasteful number, since it uses less digits than its factorization.

40315643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 40315643 is about 6349.4600557843. The cubic root of 40315643 is about 342.8924033594.

Adding to 40315643 its reverse (34651304), we get a palindrome (74966947).

The spelling of 40315643 in words is "forty million, three hundred fifteen thousand, six hundred forty-three".