40017951 has 12 divisors (see below), whose sum is σ = 57858840. Its totient is φ = 26653200.

The previous prime is 40017947. The next prime is 40017959. The reversal of 40017951 is 15971004.

It is not a de Polignac number, because 40017951 - 2² = 40017947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40017959) 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 11 ways as a sum of consecutive naturals, for example, 15940 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (4821570).

Almost surely, 2^40017951 is an apocalyptic number.

40017951 is a deficient number, since it is larger than the sum of its proper divisors (17840889).

40017951 is a wasteful number, since it uses less digits than its factorization.

40017951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4243 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 40017951 is about 6325.9743123095. The cubic root of 40017951 is about 342.0463413146.

Adding to 40017951 its reverse (15971004), we get a palindrome (55988955).

The spelling of 40017951 in words is "forty million, seventeen thousand, nine hundred fifty-one".