45523421 has 2 divisors, whose sum is σ = 45523422. Its totient is φ = 45523420.

The previous prime is 45523409. The next prime is 45523441. The reversal of 45523421 is 12432554.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 5707321 = 6310^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 45523421 - 2¹⁰ = 45522397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45523441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22761710 + 22761711.

It is an arithmetic number, because the mean of its divisors is an integer number (22761711).

Almost surely, 2^45523421 is an apocalyptic number.

It is an amenable number.

45523421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45523421 is an equidigital number, since it uses as much as digits as its factorization.

45523421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 45523421 is about 6747.1046382874. The cubic root of 45523421 is about 357.0630938291.

Adding to 45523421 its reverse (12432554), we get a palindrome (57955975).

The spelling of 45523421 in words is "forty-five million, five hundred twenty-three thousand, four hundred twenty-one".