221553134 has 8 divisors (see below), whose sum is σ = 362541528. Its totient is φ = 100705960.

The previous prime is 221553131. The next prime is 221553161. The reversal of 221553134 is 431355122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221553131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5035277 + ... + 5035320.

It is an arithmetic number, because the mean of its divisors is an integer number (45317691).

Almost surely, 2^221553134 is an apocalyptic number.

221553134 is a deficient number, since it is larger than the sum of its proper divisors (140988394).

221553134 is a wasteful number, since it uses less digits than its factorization.

221553134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10070610.

The product of its digits is 3600, while the sum is 26.

The square root of 221553134 is about 14884.6610307390. The cubic root of 221553134 is about 605.0983461461.

It can be divided in two parts, 221 and 553134, that added together give a palindrome (553355).

The spelling of 221553134 in words is "two hundred twenty-one million, five hundred fifty-three thousand, one hundred thirty-four".