221974097274 has 40 divisors (see below), whose sum is σ = 498465500148. Its totient is φ = 73830839040.

The previous prime is 221974097273. The next prime is 221974097321. The reversal of 221974097274 is 472790479122.

221974097274 is a `hidden beast` number, since 2 + 219 + 74 + 0 + 97 + 274 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 203124180249 + 18849917025 = 450693^2 + 137295^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 221974097274.

It is not an unprimeable number, because it can be changed into a prime (221974097273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1411447 + ... + 1560810.

Almost surely, 2^221974097274 is an apocalyptic number.

221974097274 is an abundant number, since it is smaller than the sum of its proper divisors (276491402874).

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

221974097274 is a wasteful number, since it uses less digits than its factorization.

221974097274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972732 (or 2972723 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 221974097274 in words is "two hundred twenty-one billion, nine hundred seventy-four million, ninety-seven thousand, two hundred seventy-four".