40551291 has 12 divisors (see below), whose sum is σ = 63899160. Its totient is φ = 24576480.

The previous prime is 40551289. The next prime is 40551299. The reversal of 40551291 is 19215504.

It is not a de Polignac number, because 40551291 - 2¹ = 40551289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40551299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204706 + ... + 204903.

It is an arithmetic number, because the mean of its divisors is an integer number (5324930).

Almost surely, 2^40551291 is an apocalyptic number.

40551291 is a deficient number, since it is larger than the sum of its proper divisors (23347869).

40551291 is a wasteful number, since it uses less digits than its factorization.

40551291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409626 (or 409623 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 40551291 is about 6367.9895571522. The cubic root of 40551291 is about 343.5591833088.

Adding to 40551291 its reverse (19215504), we get a palindrome (59766795).

The spelling of 40551291 in words is "forty million, five hundred fifty-one thousand, two hundred ninety-one".