221772274092 has 18 divisors (see below), whose sum is σ = 560591026268. Its totient is φ = 73924091352.

The previous prime is 221772274067. The next prime is 221772274093. The reversal of 221772274092 is 290472277122.

221772274092 is a `hidden beast` number, since 2 + 2 + 17 + 7 + 227 + 409 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (221772274093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3080170438 + ... + 3080170509.

Almost surely, 2^221772274092 is an apocalyptic number.

It is an amenable number.

221772274092 is an abundant number, since it is smaller than the sum of its proper divisors (338818752176).

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

221772274092 is a wasteful number, since it uses less digits than its factorization.

221772274092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160340957 (or 6160340952 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 221772274092 in words is "two hundred twenty-one billion, seven hundred seventy-two million, two hundred seventy-four thousand, ninety-two".