221513134 has 16 divisors (see below), whose sum is σ = 350154000. Its totient is φ = 104808384.

The previous prime is 221513093. The next prime is 221513147. The reversal of 221513134 is 431315122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37084 + ... + 42640.

It is an arithmetic number, because the mean of its divisors is an integer number (21884625).

Almost surely, 2^221513134 is an apocalyptic number.

221513134 is a deficient number, since it is larger than the sum of its proper divisors (128640866).

221513134 is a wasteful number, since it uses less digits than its factorization.

221513134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627.

The product of its digits is 720, while the sum is 22.

The square root of 221513134 is about 14883.3173049559. The cubic root of 221513134 is about 605.0619284102.

Adding to 221513134 its reverse (431315122), we get a palindrome (652828256).

The spelling of 221513134 in words is "two hundred twenty-one million, five hundred thirteen thousand, one hundred thirty-four".