221427160 has 32 divisors (see below), whose sum is σ = 498687840. Its totient is φ = 88486144.

The previous prime is 221427149. The next prime is 221427179. The reversal of 221427160 is 61724122.

It is a congruent number.

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, 55389 + ... + 59251.

It is an arithmetic number, because the mean of its divisors is an integer number (15583995).

Almost surely, 2^221427160 is an apocalyptic number.

221427160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221427160 is an abundant number, since it is smaller than the sum of its proper divisors (277260680).

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

221427160 is a wasteful number, since it uses less digits than its factorization.

221427160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307 (or 5303 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 221427160 is about 14880.4287572637. The cubic root of 221427160 is about 604.9836391086.

The spelling of 221427160 in words is "two hundred twenty-one million, four hundred twenty-seven thousand, one hundred sixty".