45423521 has 24 divisors (see below), whose sum is σ = 54698112. Its totient is φ = 37461600.

The previous prime is 45423431. The next prime is 45423527. The reversal of 45423521 is 12532454.

45423521 = T₂₆₀ + T₂₆₁ + ... + T₆₆₁.

It is a happy number.

45423521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-45423521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45423527) 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 23 ways as a sum of consecutive naturals, for example, 105176 + ... + 105606.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^45423521 is an apocalyptic number.

It is an amenable number.

45423521 is a deficient number, since it is larger than the sum of its proper divisors (9274591).

45423521 is a wasteful number, since it uses less digits than its factorization.

45423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 522 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 45423521 is about 6739.6973967679. The cubic root of 45423521 is about 356.8017138852.

Adding to 45423521 its reverse (12532454), we get a palindrome (57955975).

The spelling of 45423521 in words is "forty-five million, four hundred twenty-three thousand, five hundred twenty-one".