8307145321 has 4 divisors (see below), whose sum is σ = 8307331200. Its totient is φ = 8306959444.

The previous prime is 8307145309. The next prime is 8307145333. The reversal of 8307145321 is 1235417038.

8307145321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1235417038 = 2 ⋅617708519.

It is an interprime number because it is at equal distance from previous prime (8307145309) and next prime (8307145333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8307145321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8307145921) 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, 19200 + ... + 130318.

It is an arithmetic number, because the mean of its divisors is an integer number (2076832800).

Almost surely, 2^8307145321 is an apocalyptic number.

It is an amenable number.

8307145321 is a deficient number, since it is larger than the sum of its proper divisors (185879).

8307145321 is a wasteful number, since it uses less digits than its factorization.

8307145321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185878.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 8307145321 is about 91143.5423987898. The cubic root of 8307145321 is about 2025.2746928889.

The spelling of 8307145321 in words is "eight billion, three hundred seven million, one hundred forty-five thousand, three hundred twenty-one".