40506513 has 4 divisors (see below), whose sum is σ = 54008688. Its totient is φ = 27004340.

The previous prime is 40506511. The next prime is 40506569. The reversal of 40506513 is 31560504.

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 40506513 - 2¹ = 40506511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40506511) 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, 6751083 + ... + 6751088.

It is an arithmetic number, because the mean of its divisors is an integer number (13502172).

Almost surely, 2^40506513 is an apocalyptic number.

It is an amenable number.

40506513 is a deficient number, since it is larger than the sum of its proper divisors (13502175).

40506513 is a wasteful number, since it uses less digits than its factorization.

40506513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13502174.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40506513 is about 6364.4727197153. The cubic root of 40506513 is about 343.4326804802.

The spelling of 40506513 in words is "forty million, five hundred six thousand, five hundred thirteen".