214221355 has 4 divisors (see below), whose sum is σ = 257065632. Its totient is φ = 171377080.

The previous prime is 214221353. The next prime is 214221391. The reversal of 214221355 is 553122412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 214221355 - 2¹ = 214221353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214221353) 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, 21422131 + ... + 21422140.

It is an arithmetic number, because the mean of its divisors is an integer number (64266408).

Almost surely, 2^214221355 is an apocalyptic number.

214221355 is a deficient number, since it is larger than the sum of its proper divisors (42844277).

214221355 is an equidigital number, since it uses as much as digits as its factorization.

214221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42844276.

The product of its digits is 2400, while the sum is 25.

The square root of 214221355 is about 14636.3026410361. The cubic root of 214221355 is about 598.3485652572.

Adding to 214221355 its reverse (553122412), we get a palindrome (767343767).

The spelling of 214221355 in words is "two hundred fourteen million, two hundred twenty-one thousand, three hundred fifty-five".