4515312321 has 48 divisors (see below), whose sum is σ = 7346941056. Its totient is φ = 2651413248.

The previous prime is 4515312313. The next prime is 4515312341. The reversal of 4515312321 is 1232135154.

4515312321 is a `hidden beast` number, since 4 + 515 + 3 + 123 + 21 = 666.

It is not a de Polignac number, because 4515312321 - 2³ = 4515312313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4515312301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1254901 + ... + 1258493.

It is an arithmetic number, because the mean of its divisors is an integer number (153061272).

Almost surely, 2^4515312321 is an apocalyptic number.

It is an amenable number.

4515312321 is a deficient number, since it is larger than the sum of its proper divisors (2831628735).

4515312321 is a wasteful number, since it uses less digits than its factorization.

4515312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102 (or 4099 counting only the distinct ones).

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

The square root of 4515312321 is about 67196.0737022633. The cubic root of 4515312321 is about 1652.8341033528.

Adding to 4515312321 its reverse (1232135154), we get a palindrome (5747447475).

The spelling of 4515312321 in words is "four billion, five hundred fifteen million, three hundred twelve thousand, three hundred twenty-one".