221342135 has 8 divisors (see below), whose sum is σ = 303554976. Its totient is φ = 151777440.

The previous prime is 221342131. The next prime is 221342137. The reversal of 221342135 is 531243122.

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

It is not a de Polignac number, because 221342135 - 2² = 221342131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221342135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221342131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3161996 + ... + 3162065.

It is an arithmetic number, because the mean of its divisors is an integer number (37944372).

Almost surely, 2^221342135 is an apocalyptic number.

221342135 is a deficient number, since it is larger than the sum of its proper divisors (82212841).

221342135 is an equidigital number, since it uses as much as digits as its factorization.

221342135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324073.

The product of its digits is 1440, while the sum is 23.

The square root of 221342135 is about 14877.5715424259. The cubic root of 221342135 is about 604.9061940483.

Adding to 221342135 its reverse (531243122), we get a palindrome (752585257).

The spelling of 221342135 in words is "two hundred twenty-one million, three hundred forty-two thousand, one hundred thirty-five".