221381162 has 4 divisors (see below), whose sum is σ = 332071746. Its totient is φ = 110690580.

The previous prime is 221381129. The next prime is 221381183. The reversal of 221381162 is 261183122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 179533201 + 41847961 = 13399^2 + 6469^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55345289 + ... + 55345292.

Almost surely, 2^221381162 is an apocalyptic number.

221381162 is a deficient number, since it is larger than the sum of its proper divisors (110690584).

221381162 is a wasteful number, since it uses less digits than its factorization.

221381162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110690583.

The product of its digits is 1152, while the sum is 26.

The square root of 221381162 is about 14878.8830898021. The cubic root of 221381162 is about 604.9417442712.

The spelling of 221381162 in words is "two hundred twenty-one million, three hundred eighty-one thousand, one hundred sixty-two".