221214072 has 32 divisors (see below), whose sum is σ = 553409280. Its totient is φ = 73688160.

The previous prime is 221214053. The next prime is 221214073. The reversal of 221214072 is 270412122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221214073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55953 + ... + 59775.

It is an arithmetic number, because the mean of its divisors is an integer number (17294040).

Almost surely, 2^221214072 is an apocalyptic number.

It is an amenable number.

221214072 is an abundant number, since it is smaller than the sum of its proper divisors (332195208).

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

221214072 is a wasteful number, since it uses less digits than its factorization.

221214072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6243 (or 6239 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 221214072 is about 14873.2670251025. The cubic root of 221214072 is about 604.7895103651.

Adding to 221214072 its reverse (270412122), we get a palindrome (491626194).

The spelling of 221214072 in words is "two hundred twenty-one million, two hundred fourteen thousand, seventy-two".