4521244421 has 8 divisors (see below), whose sum is σ = 4601677944. Its totient is φ = 4441014720.

The previous prime is 4521244393. The next prime is 4521244423. The reversal of 4521244421 is 1244421254.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 530795521 + 3990448900 = 23039^2 + 63170^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4521244421 - 2²² = 4517050117 is a prime.

It is a super-4 number, since 4×4521244421⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521244423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5846 + ... + 95271.

It is an arithmetic number, because the mean of its divisors is an integer number (575209743).

Almost surely, 2^4521244421 is an apocalyptic number.

It is an amenable number.

4521244421 is a deficient number, since it is larger than the sum of its proper divisors (80433523).

4521244421 is a wasteful number, since it uses less digits than its factorization.

4521244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101911.

The product of its digits is 10240, while the sum is 29.

The square root of 4521244421 is about 67240.1994420005. The cubic root of 4521244421 is about 1653.5576034391.

Adding to 4521244421 its reverse (1244421254), we get a palindrome (5765665675).

The spelling of 4521244421 in words is "four billion, five hundred twenty-one million, two hundred forty-four thousand, four hundred twenty-one".