221310412 has 6 divisors (see below), whose sum is σ = 387293228. Its totient is φ = 110655204.

The previous prime is 221310371. The next prime is 221310413. The reversal of 221310412 is 214013122.

It is not an unprimeable number, because it can be changed into a prime (221310413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27663798 + ... + 27663805.

Almost surely, 2^221310412 is an apocalyptic number.

It is an amenable number.

221310412 is a deficient number, since it is larger than the sum of its proper divisors (165982816).

221310412 is a wasteful number, since it uses less digits than its factorization.

221310412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55327607 (or 55327605 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221310412 is about 14876.5053692055. The cubic root of 221310412 is about 604.8772940590.

Adding to 221310412 its reverse (214013122), we get a palindrome (435323534).

The spelling of 221310412 in words is "two hundred twenty-one million, three hundred ten thousand, four hundred twelve".