221431214 has 8 divisors (see below), whose sum is σ = 332585568. Its totient is φ = 110569360.

The previous prime is 221431213. The next prime is 221431219. The reversal of 221431214 is 412134122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431213) 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, 71222 + ... + 74265.

It is an arithmetic number, because the mean of its divisors is an integer number (41573196).

Almost surely, 2^221431214 is an apocalyptic number.

221431214 is a deficient number, since it is larger than the sum of its proper divisors (111154354).

221431214 is a wasteful number, since it uses less digits than its factorization.

221431214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146250.

The product of its digits is 384, while the sum is 20.

The square root of 221431214 is about 14880.5649758334. The cubic root of 221431214 is about 604.9873312011.

Adding to 221431214 its reverse (412134122), we get a palindrome (633565336).

The spelling of 221431214 in words is "two hundred twenty-one million, four hundred thirty-one thousand, two hundred fourteen".