73725571 has 4 divisors (see below), whose sum is σ = 75718192. Its totient is φ = 71732952.

The previous prime is 73725551. The next prime is 73725581. The reversal of 73725571 is 17552737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17552737 = 3541 ⋅4957.

It is a cyclic number.

It is not a de Polignac number, because 73725571 - 2¹⁹ = 73201283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1992583 = 73725571 / (7 + 3 + 7 + 2 + 5 + 5 + 7 + 1).

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 73725571.

It is not an unprimeable number, because it can be changed into a prime (73725551) 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, 996255 + ... + 996328.

It is an arithmetic number, because the mean of its divisors is an integer number (18929548).

Almost surely, 2^73725571 is an apocalyptic number.

73725571 is a deficient number, since it is larger than the sum of its proper divisors (1992621).

73725571 is a wasteful number, since it uses less digits than its factorization.

73725571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992620.

The product of its digits is 51450, while the sum is 37.

The square root of 73725571 is about 8586.3595894884. The cubic root of 73725571 is about 419.3140181467.

The spelling of 73725571 in words is "seventy-three million, seven hundred twenty-five thousand, five hundred seventy-one".