7286500321 has 3 divisors (see below), whose sum is σ = 7286585683. Its totient is φ = 7286414960.

The previous prime is 7286500313. The next prime is 7286500387. The reversal of 7286500321 is 1230056827.

It is a happy number.

The square root of 7286500321 is 85361.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1230056827 = 19 ⋅64739833.

It can be written as a sum of positive squares in only one way, i.e., 5265098721 + 2021401600 = 72561^2 + 44960^2 .

It is not a de Polignac number, because 7286500321 - 2³ = 7286500313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7286500301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 42681 + ... + 128041.

Almost surely, 2^7286500321 is an apocalyptic number.

7286500321 is the 85361-st square number.

7286500321 is the 42681-st centered octagonal number.

It is an amenable number.

7286500321 is a deficient number, since it is larger than the sum of its proper divisors (85362).

7286500321 is an frugal number, since it uses more digits than its factorization.

7286500321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170722 (or 85361 counting only the distinct ones).

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

The cubic root of 7286500321 is about 1938.6808903002.

The spelling of 7286500321 in words is "seven billion, two hundred eighty-six million, five hundred thousand, three hundred twenty-one".