221052680 has 32 divisors (see below), whose sum is σ = 508939200. Its totient is φ = 86364096.

The previous prime is 221052679. The next prime is 221052697. The reversal of 221052680 is 86250122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62540 + ... + 65979.

It is an arithmetic number, because the mean of its divisors is an integer number (15904350).

Almost surely, 2^221052680 is an apocalyptic number.

221052680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221052680 is an abundant number, since it is smaller than the sum of its proper divisors (287886520).

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

221052680 is a wasteful number, since it uses less digits than its factorization.

221052680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128573 (or 128569 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 221052680 is about 14867.8404618828. The cubic root of 221052680 is about 604.6423950469.

The spelling of 221052680 in words is "two hundred twenty-one million, fifty-two thousand, six hundred eighty".