40643115 has 16 divisors (see below), whose sum is σ = 65921568. Its totient is φ = 21378816.

The previous prime is 40643111. The next prime is 40643117. The reversal of 40643115 is 51134604.

It is not a de Polignac number, because 40643115 - 2² = 40643111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40643111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17464 + ... + 19653.

It is an arithmetic number, because the mean of its divisors is an integer number (4120098).

Almost surely, 2^40643115 is an apocalyptic number.

40643115 is a deficient number, since it is larger than the sum of its proper divisors (25278453).

40643115 is a wasteful number, since it uses less digits than its factorization.

40643115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37198.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40643115 is about 6375.1952911264. The cubic root of 40643115 is about 343.8183053245.

Adding to 40643115 its reverse (51134604), we get a palindrome (91777719).

The spelling of 40643115 in words is "forty million, six hundred forty-three thousand, one hundred fifteen".