4551321321 has 6 divisors (see below), whose sum is σ = 6574130810. Its totient is φ = 3034214208.

The previous prime is 4551321319. The next prime is 4551321329. The reversal of 4551321321 is 1231231554.

It can be written as a sum of positive squares in only one way, i.e., 3356927721 + 1194393600 = 57939^2 + 34560^2 .

It is not a de Polignac number, because 4551321321 - 2¹ = 4551321319 is a prime.

It is a super-3 number, since 3×4551321321³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4551321329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252851176 + ... + 252851193.

Almost surely, 2^4551321321 is an apocalyptic number.

It is an amenable number.

4551321321 is a deficient number, since it is larger than the sum of its proper divisors (2022809489).

4551321321 is a wasteful number, since it uses less digits than its factorization.

4551321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505702375 (or 505702372 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 4551321321 is about 67463.4813880814. The cubic root of 4551321321 is about 1657.2161839414.

Adding to 4551321321 its reverse (1231231554), we get a palindrome (5782552875).

The spelling of 4551321321 in words is "four billion, five hundred fifty-one million, three hundred twenty-one thousand, three hundred twenty-one".