2518072321 has 8 divisors (see below), whose sum is σ = 2541951720. Its totient is φ = 2494305408.

The previous prime is 2518072301. The next prime is 2518072367. The reversal of 2518072321 is 1232708152.

It can be written as a sum of positive squares in 4 ways, for example, as 2363418225 + 154654096 = 48615^2 + 12436^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2518072321 - 2¹¹ = 2518070273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2518072301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17205 + ... + 73021.

It is an arithmetic number, because the mean of its divisors is an integer number (317743965).

Almost surely, 2^2518072321 is an apocalyptic number.

It is an amenable number.

2518072321 is a deficient number, since it is larger than the sum of its proper divisors (23879399).

2518072321 is a wasteful number, since it uses less digits than its factorization.

2518072321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56243.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2518072321 is about 50180.3977764226. The cubic root of 2518072321 is about 1360.4713477593.

The spelling of 2518072321 in words is "two billion, five hundred eighteen million, seventy-two thousand, three hundred twenty-one".