214621231 has 4 divisors (see below), whose sum is σ = 234132264. Its totient is φ = 195110200.

The previous prime is 214621229. The next prime is 214621247. The reversal of 214621231 is 132126412.

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

It is a cyclic number.

It is not a de Polignac number, because 214621231 - 2¹ = 214621229 is a prime.

It is a super-2 number, since 2×214621231² = 92124545591910722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214621031) 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, 9755500 + ... + 9755521.

It is an arithmetic number, because the mean of its divisors is an integer number (58533066).

Almost surely, 2^214621231 is an apocalyptic number.

214621231 is a deficient number, since it is larger than the sum of its proper divisors (19511033).

214621231 is a wasteful number, since it uses less digits than its factorization.

214621231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19511032.

The product of its digits is 576, while the sum is 22.

The square root of 214621231 is about 14649.9566893558. The cubic root of 214621231 is about 598.7206360223.

Adding to 214621231 its reverse (132126412), we get a palindrome (346747643).

The spelling of 214621231 in words is "two hundred fourteen million, six hundred twenty-one thousand, two hundred thirty-one".