225591788402 has 18 divisors (see below), whose sum is σ = 339945426093. Its totient is φ = 112279019512.

The previous prime is 225591788371. The next prime is 225591788407. The reversal of 225591788402 is 204887195522.

It can be written as a sum of positive squares in 2 ways, for example, as 219894407041 + 5697381361 = 468929^2 + 75481^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335851.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225591788407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 176656988 + ... + 176658264.

Almost surely, 2^225591788402 is an apocalyptic number.

225591788402 is a deficient number, since it is larger than the sum of its proper divisors (114353637691).

225591788402 is an frugal number, since it uses more digits than its factorization.

225591788402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 225591788402 in words is "two hundred twenty-five billion, five hundred ninety-one million, seven hundred eighty-eight thousand, four hundred two".