221650146 has 24 divisors (see below), whose sum is σ = 480540060. Its totient is φ = 73837536.

The previous prime is 221650127. The next prime is 221650153. The reversal of 221650146 is 641056122.

221650146 is a `hidden beast` number, since 2 + 2 + 1 + 650 + 1 + 4 + 6 = 666.

221650146 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 161417025 + 60233121 = 12705^2 + 7761^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38896 + ... + 44228.

Almost surely, 2^221650146 is an apocalyptic number.

221650146 is an abundant number, since it is smaller than the sum of its proper divisors (258889914).

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

221650146 is a wasteful number, since it uses less digits than its factorization.

221650146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650 (or 7647 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 221650146 is about 14887.9194651234. The cubic root of 221650146 is about 605.1866518779.

The spelling of 221650146 in words is "two hundred twenty-one million, six hundred fifty thousand, one hundred forty-six".