5512720321 has 4 divisors (see below), whose sum is σ = 5513480644. Its totient is φ = 5511960000.

The previous prime is 5512720319. The next prime is 5512720331. The reversal of 5512720321 is 1230272155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 880012225 + 4632708096 = 29665^2 + 68064^2 .

It is a cyclic number.

It is not a de Polignac number, because 5512720321 - 2¹ = 5512720319 is a prime.

It is a super-3 number, since 3×5512720321³ (a number of 30 digits) contains 333 as substring.

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 5512720321.

It is not an unprimeable number, because it can be changed into a prime (5512720331) 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, 369180 + ... + 383821.

It is an arithmetic number, because the mean of its divisors is an integer number (1378370161).

Almost surely, 2^5512720321 is an apocalyptic number.

It is an amenable number.

5512720321 is a deficient number, since it is larger than the sum of its proper divisors (760323).

5512720321 is an equidigital number, since it uses as much as digits as its factorization.

5512720321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760322.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 5512720321 is about 74247.6957285544. The cubic root of 5512720321 is about 1766.5339430651.

Adding to 5512720321 its reverse (1230272155), we get a palindrome (6742992476).

The spelling of 5512720321 in words is "five billion, five hundred twelve million, seven hundred twenty thousand, three hundred twenty-one".