2552440321 has 4 divisors (see below), whose sum is σ = 2552714500. Its totient is φ = 2552166144.

The previous prime is 2552440291. The next prime is 2552440343. The reversal of 2552440321 is 1230442552.

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 98724096 + 2453716225 = 9936^2 + 49535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2552440321 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 2552440321.

It is not an unprimeable number, because it can be changed into a prime (2552440351) 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, 122616 + ... + 141913.

It is an arithmetic number, because the mean of its divisors is an integer number (638178625).

Almost surely, 2^2552440321 is an apocalyptic number.

It is an amenable number.

2552440321 is a deficient number, since it is larger than the sum of its proper divisors (274179).

2552440321 is an equidigital number, since it uses as much as digits as its factorization.

2552440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274178.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 2552440321 is about 50521.6816921211. The cubic root of 2552440321 is about 1366.6328808291.

Adding to 2552440321 its reverse (1230442552), we get a palindrome (3782882873).

The spelling of 2552440321 in words is "two billion, five hundred fifty-two million, four hundred forty thousand, three hundred twenty-one".