221412246 has 32 divisors (see below), whose sum is σ = 494322048. Its totient is φ = 65533440.

The previous prime is 221412241. The next prime is 221412251. The reversal of 221412246 is 642214122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221412241) and next prime (221412251).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36171 + ... + 41846.

It is an arithmetic number, because the mean of its divisors is an integer number (15447564).

Almost surely, 2^221412246 is an apocalyptic number.

221412246 is an abundant number, since it is smaller than the sum of its proper divisors (272909802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221412246 is a wasteful number, since it uses less digits than its factorization.

221412246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78076.

The product of its digits is 1536, while the sum is 24.

The square root of 221412246 is about 14879.9276207917. The cubic root of 221412246 is about 604.9700561188.

Adding to 221412246 its reverse (642214122), we get a palindrome (863626368).

The spelling of 221412246 in words is "two hundred twenty-one million, four hundred twelve thousand, two hundred forty-six".