221270072 has 16 divisors (see below), whose sum is σ = 415240560. Its totient is φ = 110539264.

The previous prime is 221270047. The next prime is 221270089. The reversal of 221270072 is 270072122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 21099.

It is an arithmetic number, because the mean of its divisors is an integer number (25952535).

Almost surely, 2^221270072 is an apocalyptic number.

It is an amenable number.

221270072 is a deficient number, since it is larger than the sum of its proper divisors (193970488).

221270072 is a wasteful number, since it uses less digits than its factorization.

221270072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23950 (or 23946 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 221270072 is about 14875.1494782405. The cubic root of 221270072 is about 604.8405399022.

The spelling of 221270072 in words is "two hundred twenty-one million, two hundred seventy thousand, seventy-two".