7152091321 has 4 divisors (see below), whose sum is σ = 7528517200. Its totient is φ = 6775665444.

The previous prime is 7152091319. The next prime is 7152091357. The reversal of 7152091321 is 1231902517.

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.

It is a cyclic number.

It is not a de Polignac number, because 7152091321 - 2¹ = 7152091319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7152091361) 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, 188212911 + ... + 188212948.

It is an arithmetic number, because the mean of its divisors is an integer number (1882129300).

Almost surely, 2^7152091321 is an apocalyptic number.

It is an amenable number.

7152091321 is a deficient number, since it is larger than the sum of its proper divisors (376425879).

7152091321 is a wasteful number, since it uses less digits than its factorization.

7152091321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376425878.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 7152091321 is about 84570.0379626260. The cubic root of 7152091321 is about 1926.6863343970.

Adding to 7152091321 its reverse (1231902517), we get a palindrome (8383993838).

The spelling of 7152091321 in words is "seven billion, one hundred fifty-two million, ninety-one thousand, three hundred twenty-one".