221238754 has 16 divisors (see below), whose sum is σ = 373706496. Its totient is φ = 97318800.

The previous prime is 221238751. The next prime is 221238763. The reversal of 221238754 is 457832122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221238751) 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 7 ways as a sum of consecutive naturals, for example, 161517 + ... + 162880.

It is an arithmetic number, because the mean of its divisors is an integer number (23356656).

Almost surely, 2^221238754 is an apocalyptic number.

221238754 is a deficient number, since it is larger than the sum of its proper divisors (152467742).

221238754 is a wasteful number, since it uses less digits than its factorization.

221238754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324441.

The product of its digits is 26880, while the sum is 34.

The square root of 221238754 is about 14874.0967456851. The cubic root of 221238754 is about 604.8120026948.

The spelling of 221238754 in words is "two hundred twenty-one million, two hundred thirty-eight thousand, seven hundred fifty-four".