40515291 has 12 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 26078640.

The previous prime is 40515289. The next prime is 40515311. The reversal of 40515291 is 19251504.

It is not a de Polignac number, because 40515291 - 2¹ = 40515289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40515271) 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, 77355 + ... + 77876.

It is an arithmetic number, because the mean of its divisors is an integer number (5045040).

Almost surely, 2^40515291 is an apocalyptic number.

40515291 is a deficient number, since it is larger than the sum of its proper divisors (20025189).

40515291 is a wasteful number, since it uses less digits than its factorization.

40515291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155266 (or 155263 counting only the distinct ones).

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

The square root of 40515291 is about 6365.1622917252. The cubic root of 40515291 is about 343.4574866501.

Adding to 40515291 its reverse (19251504), we get a palindrome (59766795).

The spelling of 40515291 in words is "forty million, five hundred fifteen thousand, two hundred ninety-one".