221048379 has 32 divisors (see below), whose sum is σ = 336061440. Its totient is φ = 143535456.

The previous prime is 221048357. The next prime is 221048389. The reversal of 221048379 is 973840122.

It is not a de Polignac number, because 221048379 - 2¹³ = 221040187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221048389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473104 + ... + 473570.

It is an arithmetic number, because the mean of its divisors is an integer number (10501920).

Almost surely, 2^221048379 is an apocalyptic number.

221048379 is a deficient number, since it is larger than the sum of its proper divisors (115013061).

221048379 is a wasteful number, since it uses less digits than its factorization.

221048379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 221048379 is about 14867.6958201330. The cubic root of 221048379 is about 604.6384735325.

It can be divided in two parts, 22 and 1048379, that added together give a palindrome (1048401).

The spelling of 221048379 in words is "two hundred twenty-one million, forty-eight thousand, three hundred seventy-nine".