221946922170 has 48 divisors (see below), whose sum is σ = 578169724392. Its totient is φ = 59072232960.

The previous prime is 221946922159. The next prime is 221946922189. The reversal of 221946922170 is 71229649122.

221946922170 is a `hidden beast` number, since 2 + 2 + 19 + 469 + 2 + 2 + 170 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 164825444169 + 57121478001 = 405987^2 + 239001^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2319787 + ... + 2413566.

Almost surely, 2^221946922170 is an apocalyptic number.

221946922170 is an abundant number, since it is smaller than the sum of its proper divisors (356222802222).

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

221946922170 is a wasteful number, since it uses less digits than its factorization.

221946922170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733887 (or 4733884 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 221946922170 in words is "two hundred twenty-one billion, nine hundred forty-six million, nine hundred twenty-two thousand, one hundred seventy".