221311034 has 32 divisors (see below), whose sum is σ = 389370240. Its totient is φ = 92385792.

The previous prime is 221311009. The next prime is 221311039. The reversal of 221311034 is 430113122.

It is not an unprimeable number, because it can be changed into a prime (221311039) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 83522 + ... + 86130.

It is an arithmetic number, because the mean of its divisors is an integer number (12167820).

Almost surely, 2^221311034 is an apocalyptic number.

221311034 is a deficient number, since it is larger than the sum of its proper divisors (168059206).

221311034 is a wasteful number, since it uses less digits than its factorization.

221311034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 221311034 is about 14876.5262746382. The cubic root of 221311034 is about 604.8778607341.

Adding to 221311034 its reverse (430113122), we get a palindrome (651424156).

The spelling of 221311034 in words is "two hundred twenty-one million, three hundred eleven thousand, thirty-four".