40549971 has 32 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 19954080.

The previous prime is 40549969. The next prime is 40549979. The reversal of 40549971 is 17994504.

It is not a de Polignac number, because 40549971 - 2¹ = 40549969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40549979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231 + ... + 9008.

It is an arithmetic number, because the mean of its divisors is an integer number (2217600).

Almost surely, 2^40549971 is an apocalyptic number.

40549971 is a deficient number, since it is larger than the sum of its proper divisors (30413229).

40549971 is a wasteful number, since it uses less digits than its factorization.

40549971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9279.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 40549971 is about 6367.8859129227. The cubic root of 40549971 is about 343.5554554945. Note that the first 3 decimals are identical.

The spelling of 40549971 in words is "forty million, five hundred forty-nine thousand, nine hundred seventy-one".