7272143521 has 8 divisors (see below), whose sum is σ = 7432637184. Its totient is φ = 7113385200.

The previous prime is 7272143477. The next prime is 7272143537. The reversal of 7272143521 is 1253412727.

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 7272143521 - 2³¹ = 5124659873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7272143551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425361 + ... + 442126.

It is an arithmetic number, because the mean of its divisors is an integer number (929079648).

Almost surely, 2^7272143521 is an apocalyptic number.

It is an amenable number.

7272143521 is a deficient number, since it is larger than the sum of its proper divisors (160493663).

7272143521 is a wasteful number, since it uses less digits than its factorization.

7272143521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867671.

The product of its digits is 23520, while the sum is 34.

The square root of 7272143521 is about 85276.8639256862. The cubic root of 7272143521 is about 1937.4067736538.

The spelling of 7272143521 in words is "seven billion, two hundred seventy-two million, one hundred forty-three thousand, five hundred twenty-one".