221501260 has 12 divisors (see below), whose sum is σ = 465152688. Its totient is φ = 88600496.

The previous prime is 221501243. The next prime is 221501303. The reversal of 221501260 is 62105122.

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, 5537512 + ... + 5537551.

It is an arithmetic number, because the mean of its divisors is an integer number (38762724).

Almost surely, 2^221501260 is an apocalyptic number.

221501260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221501260 is an abundant number, since it is smaller than the sum of its proper divisors (243651428).

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

221501260 is a wasteful number, since it uses less digits than its factorization.

221501260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075072 (or 11075070 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 221501260 is about 14882.9183966049. The cubic root of 221501260 is about 605.0511169614.

Adding to 221501260 its reverse (62105122), we get a palindrome (283606382).

The spelling of 221501260 in words is "two hundred twenty-one million, five hundred one thousand, two hundred sixty".