40564551 has 4 divisors (see below), whose sum is σ = 54086072. Its totient is φ = 27043032.

The previous prime is 40564549. The next prime is 40564553. The reversal of 40564551 is 15546504.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40564549) and next prime (40564553).

It is not a de Polignac number, because 40564551 - 2¹ = 40564549 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40564553) 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, 6760756 + ... + 6760761.

It is an arithmetic number, because the mean of its divisors is an integer number (13521518).

Almost surely, 2^40564551 is an apocalyptic number.

40564551 is a deficient number, since it is larger than the sum of its proper divisors (13521521).

40564551 is a wasteful number, since it uses less digits than its factorization.

40564551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13521520.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 40564551 is about 6369.0306169778. The cubic root of 40564551 is about 343.5966264103.

The spelling of 40564551 in words is "forty million, five hundred sixty-four thousand, five hundred fifty-one".