45550421 has 4 divisors (see below), whose sum is σ = 52057632. Its totient is φ = 39043212.

The previous prime is 45550409. The next prime is 45550457. The reversal of 45550421 is 12405554.

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 45550421 - 2⁶ = 45550357 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 (45550471) 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, 3253595 + ... + 3253608.

It is an arithmetic number, because the mean of its divisors is an integer number (13014408).

Almost surely, 2^45550421 is an apocalyptic number.

It is an amenable number.

45550421 is a deficient number, since it is larger than the sum of its proper divisors (6507211).

45550421 is an equidigital number, since it uses as much as digits as its factorization.

45550421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507210.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 45550421 is about 6749.1051999506. The cubic root of 45550421 is about 357.1336714056.

Adding to 45550421 its reverse (12405554), we get a palindrome (57955975).

The spelling of 45550421 in words is "forty-five million, five hundred fifty thousand, four hundred twenty-one".