40543251 has 32 divisors (see below), whose sum is σ = 63936000. Its totient is φ = 22374144.

The previous prime is 40543229. The next prime is 40543253. The reversal of 40543251 is 15234504.

It is not a de Polignac number, because 40543251 - 2⁷ = 40543123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40543253) 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 31 ways as a sum of consecutive naturals, for example, 81000 + ... + 81498.

It is an arithmetic number, because the mean of its divisors is an integer number (1998000).

Almost surely, 2^40543251 is an apocalyptic number.

40543251 is a deficient number, since it is larger than the sum of its proper divisors (23392749).

40543251 is a wasteful number, since it uses less digits than its factorization.

40543251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 40543251 is about 6367.3582434162. The cubic root of 40543251 is about 343.5364762766.

Adding to 40543251 its reverse (15234504), we get a palindrome (55777755).

The spelling of 40543251 in words is "forty million, five hundred forty-three thousand, two hundred fifty-one".