4472743521 has 4 divisors (see below), whose sum is σ = 5963658032. Its totient is φ = 2981829012.

The previous prime is 4472743501. The next prime is 4472743523. The reversal of 4472743521 is 1253472744.

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 not a de Polignac number, because 4472743521 - 2¹⁴ = 4472727137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4472743521.

It is not an unprimeable number, because it can be changed into a prime (4472743523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745457251 + ... + 745457256.

It is an arithmetic number, because the mean of its divisors is an integer number (1490914508).

Almost surely, 2^4472743521 is an apocalyptic number.

It is an amenable number.

4472743521 is a deficient number, since it is larger than the sum of its proper divisors (1490914511).

4472743521 is a wasteful number, since it uses less digits than its factorization.

4472743521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490914510.

The product of its digits is 188160, while the sum is 39.

The square root of 4472743521 is about 66878.5729587586. The cubic root of 4472743521 is about 1647.6235788064.

The spelling of 4472743521 in words is "four billion, four hundred seventy-two million, seven hundred forty-three thousand, five hundred twenty-one".