221914212 has 96 divisors (see below), whose sum is σ = 587661312. Its totient is φ = 64665216.

The previous prime is 221914211. The next prime is 221914229. The reversal of 221914212 is 212419122.

It is not an unprimeable number, because it can be changed into a prime (221914211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455433 + ... + 455919.

It is an arithmetic number, because the mean of its divisors is an integer number (6121472).

Almost surely, 2^221914212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221914212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293830656).

221914212 is an abundant number, since it is smaller than the sum of its proper divisors (365747100).

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

221914212 is a wasteful number, since it uses less digits than its factorization.

221914212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 655 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 221914212 is about 14896.7852907934. The cubic root of 221914212 is about 605.4268890258.

The spelling of 221914212 in words is "two hundred twenty-one million, nine hundred fourteen thousand, two hundred twelve".