221378162 has 4 divisors (see below), whose sum is σ = 332067246. Its totient is φ = 110689080.

The previous prime is 221378149. The next prime is 221378173. The reversal of 221378162 is 261873122.

221378162 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 121198081 + 100180081 = 11009^2 + 10009^2 .

It is a super-2 number, since 2×221378162² = 98016581220996488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55344539 + ... + 55344542.

Almost surely, 2^221378162 is an apocalyptic number.

221378162 is a deficient number, since it is larger than the sum of its proper divisors (110689084).

221378162 is a wasteful number, since it uses less digits than its factorization.

221378162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110689083.

The product of its digits is 8064, while the sum is 32.

The square root of 221378162 is about 14878.7822754418. The cubic root of 221378162 is about 604.9390116788.

The spelling of 221378162 in words is "two hundred twenty-one million, three hundred seventy-eight thousand, one hundred sixty-two".