4454216521 has 4 divisors (see below), whose sum is σ = 4454557200. Its totient is φ = 4453875844.

The previous prime is 4454216477. The next prime is 4454216527. The reversal of 4454216521 is 1256124544.

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 4454216521 - 2¹³ = 4454208329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4454216527) 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, 149911 + ... + 177148.

It is an arithmetic number, because the mean of its divisors is an integer number (1113639300).

Almost surely, 2^4454216521 is an apocalyptic number.

It is an amenable number.

4454216521 is a deficient number, since it is larger than the sum of its proper divisors (340679).

4454216521 is a wasteful number, since it uses less digits than its factorization.

4454216521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340678.

The product of its digits is 38400, while the sum is 34.

The square root of 4454216521 is about 66739.9169987497. The cubic root of 4454216521 is about 1645.3455014719.

The spelling of 4454216521 in words is "four billion, four hundred fifty-four million, two hundred sixteen thousand, five hundred twenty-one".