221572474939 has 16 divisors (see below), whose sum is σ = 224214220800. Its totient is φ = 218946581280.

The previous prime is 221572474909. The next prime is 221572474957. The reversal of 221572474939 is 939474275122.

It is a cyclic number.

It is not a de Polignac number, because 221572474939 - 2⁷ = 221572474811 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 221572474939.

It is not an unprimeable number, because it can be changed into a prime (221572474909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35740162 + ... + 35746360.

It is an arithmetic number, because the mean of its divisors is an integer number (14013388800).

Almost surely, 2^221572474939 is an apocalyptic number.

221572474939 is a deficient number, since it is larger than the sum of its proper divisors (2641745861).

221572474939 is a wasteful number, since it uses less digits than its factorization.

221572474939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7410.

The product of its digits is 7620480, while the sum is 55.

The spelling of 221572474939 in words is "two hundred twenty-one billion, five hundred seventy-two million, four hundred seventy-four thousand, nine hundred thirty-nine".