221479160 has 32 divisors (see below), whose sum is σ = 569518560. Its totient is φ = 75935616.

The previous prime is 221479147. The next prime is 221479169. The reversal of 221479160 is 61974122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221479169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395219 + ... + 395778.

It is an arithmetic number, because the mean of its divisors is an integer number (17797455).

Almost surely, 2^221479160 is an apocalyptic number.

221479160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221479160 is an abundant number, since it is smaller than the sum of its proper divisors (348039400).

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

221479160 is a wasteful number, since it uses less digits than its factorization.

221479160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791015 (or 791011 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 221479160 is about 14882.1759161757. The cubic root of 221479160 is about 605.0309935628.

The spelling of 221479160 in words is "two hundred twenty-one million, four hundred seventy-nine thousand, one hundred sixty".