221534124 has 48 divisors (see below), whose sum is σ = 603337728. Its totient is φ = 61947648.

The previous prime is 221534113. The next prime is 221534141. The reversal of 221534124 is 421435122.

It is a junction number, because it is equal to n+sod(n) for n = 221534094 and 221534103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24109 + ... + 32004.

It is an arithmetic number, because the mean of its divisors is an integer number (12569536).

Almost surely, 2^221534124 is an apocalyptic number.

It is an amenable number.

221534124 is an abundant number, since it is smaller than the sum of its proper divisors (381803604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221534124 is a wasteful number, since it uses less digits than its factorization.

221534124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56174 (or 56172 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 221534124 is about 14884.0224401873. The cubic root of 221534124 is about 605.0810391637.

Adding to 221534124 its reverse (421435122), we get a palindrome (642969246).

The spelling of 221534124 in words is "two hundred twenty-one million, five hundred thirty-four thousand, one hundred twenty-four".