214153221 has 4 divisors (see below), whose sum is σ = 285537632. Its totient is φ = 142768812.

The previous prime is 214153213. The next prime is 214153223. The reversal of 214153221 is 122351412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 214153221 - 2³ = 214153213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214153223) 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, 35692201 + ... + 35692206.

It is an arithmetic number, because the mean of its divisors is an integer number (71384408).

Almost surely, 2^214153221 is an apocalyptic number.

It is an amenable number.

214153221 is a deficient number, since it is larger than the sum of its proper divisors (71384411).

214153221 is an equidigital number, since it uses as much as digits as its factorization.

214153221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71384410.

The product of its digits is 480, while the sum is 21.

The square root of 214153221 is about 14633.9748872273. The cubic root of 214153221 is about 598.2851227742.

The spelling of 214153221 in words is "two hundred fourteen million, one hundred fifty-three thousand, two hundred twenty-one".