40424551 has 4 divisors (see below), whose sum is σ = 40453504. Its totient is φ = 40395600.

The previous prime is 40424539. The next prime is 40424561. The reversal of 40424551 is 15542404.

It is a happy number.

40424551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40424551 - 2²⁵ = 6870119 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 (40424561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12270 + ... + 15211.

It is an arithmetic number, because the mean of its divisors is an integer number (10113376).

Almost surely, 2^40424551 is an apocalyptic number.

40424551 is a deficient number, since it is larger than the sum of its proper divisors (28953).

40424551 is a wasteful number, since it uses less digits than its factorization.

40424551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28952.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 40424551 is about 6358.0304340259. The cubic root of 40424551 is about 343.2008870057.

Adding to 40424551 its reverse (15542404), we get a palindrome (55966955).

The spelling of 40424551 in words is "forty million, four hundred twenty-four thousand, five hundred fifty-one".