45516421 has 4 divisors (see below), whose sum is σ = 45958432. Its totient is φ = 45074412.

The previous prime is 45516413. The next prime is 45516433. The reversal of 45516421 is 12461554.

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 45516421 - 2³ = 45516413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45516421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45516461) 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, 220851 + ... + 221056.

It is an arithmetic number, because the mean of its divisors is an integer number (11489608).

Almost surely, 2^45516421 is an apocalyptic number.

It is an amenable number.

45516421 is a deficient number, since it is larger than the sum of its proper divisors (442011).

45516421 is a wasteful number, since it uses less digits than its factorization.

45516421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442010.

The product of its digits is 4800, while the sum is 28.

The square root of 45516421 is about 6746.5858773160. The cubic root of 45516421 is about 357.0447913837.

Adding to 45516421 its reverse (12461554), we get a palindrome (57977975).

The spelling of 45516421 in words is "forty-five million, five hundred sixteen thousand, four hundred twenty-one".