221074260 has 144 divisors (see below), whose sum is σ = 699635328. Its totient is φ = 52081920.

The previous prime is 221074247. The next prime is 221074267. The reversal of 221074260 is 62470122.

221074260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221074260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221074267) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268209 + ... + 269031.

Almost surely, 2^221074260 is an apocalyptic number.

221074260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221074260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349817664).

221074260 is an abundant number, since it is smaller than the sum of its proper divisors (478561068).

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

221074260 is a wasteful number, since it uses less digits than its factorization.

221074260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 221074260 is about 14868.5661716253. The cubic root of 221074260 is about 604.6620702337.

The spelling of 221074260 in words is "two hundred twenty-one million, seventy-four thousand, two hundred sixty".