40515493 has 4 divisors (see below), whose sum is σ = 40727808. Its totient is φ = 40303180.

The previous prime is 40515491. The next prime is 40515509. The reversal of 40515493 is 39451504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40515493 - 2¹ = 40515491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40515491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105871 + ... + 106252.

It is an arithmetic number, because the mean of its divisors is an integer number (10181952).

Almost surely, 2^40515493 is an apocalyptic number.

It is an amenable number.

40515493 is a deficient number, since it is larger than the sum of its proper divisors (212315).

40515493 is a wasteful number, since it uses less digits than its factorization.

40515493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212314.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 40515493 is about 6365.1781593291. The cubic root of 40515493 is about 343.4580574494.

Adding to 40515493 its reverse (39451504), we get a palindrome (79966997).

The spelling of 40515493 in words is "forty million, five hundred fifteen thousand, four hundred ninety-three".