225618657282 has 90 divisors (see below), whose sum is σ = 514134142137. Its totient is φ = 73950733296.

The previous prime is 225618657269. The next prime is 225618657307. The reversal of 225618657282 is 282756816522.

225618657282 is a `hidden beast` number, since 2 + 2 + 5 + 61 + 8 + 6 + 572 + 8 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176644524681 + 48974132601 = 420291^2 + 221301^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335871.

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

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 405060148 + ... + 405060704.

Almost surely, 2^225618657282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225618657282

225618657282 is an abundant number, since it is smaller than the sum of its proper divisors (288515484855).

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

225618657282 is an frugal number, since it uses more digits than its factorization.

225618657282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262 (or 629 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The spelling of 225618657282 in words is "two hundred twenty-five billion, six hundred eighteen million, six hundred fifty-seven thousand, two hundred eighty-two".