221260992 has 56 divisors (see below), whose sum is σ = 593701632. Its totient is φ = 72710400.

The previous prime is 221260957. The next prime is 221260993. The reversal of 221260992 is 299062122.

It is not an unprimeable number, because it can be changed into a prime (221260993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5517 + ... + 21747.

Almost surely, 2^221260992 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 221260992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296850816).

221260992 is an abundant number, since it is smaller than the sum of its proper divisors (372440640).

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

221260992 is a wasteful number, since it uses less digits than its factorization.

221260992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16317 (or 16307 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 221260992 is about 14874.8442680924. The cubic root of 221260992 is about 604.8322664121.

The spelling of 221260992 in words is "two hundred twenty-one million, two hundred sixty thousand, nine hundred ninety-two".