221161468 has 48 divisors (see below), whose sum is σ = 446052096. Its totient is φ = 94962560.

The previous prime is 221161363. The next prime is 221161487. The reversal of 221161468 is 864161122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82680 + ... + 85312.

It is an arithmetic number, because the mean of its divisors is an integer number (9292752).

Almost surely, 2^221161468 is an apocalyptic number.

It is an amenable number.

221161468 is an abundant number, since it is smaller than the sum of its proper divisors (224890628).

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

221161468 is a wasteful number, since it uses less digits than its factorization.

221161468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2752 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 221161468 is about 14871.4985122549. The cubic root of 221161468 is about 604.7415675598.

The spelling of 221161468 in words is "two hundred twenty-one million, one hundred sixty-one thousand, four hundred sixty-eight".