225642889897 has 4 divisors (see below), whose sum is σ = 230443802496. Its totient is φ = 220841977300.

The previous prime is 225642889889. The next prime is 225642889921. The reversal of 225642889897 is 798988246522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225642889897 - 2³ = 225642889889 is a prime.

It is a super-2 number, since 2×225642889897² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225642889837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400456229 + ... + 2400456322.

It is an arithmetic number, because the mean of its divisors is an integer number (57610950624).

Almost surely, 2^225642889897 is an apocalyptic number.

It is an amenable number.

225642889897 is a deficient number, since it is larger than the sum of its proper divisors (4800912599).

225642889897 is an equidigital number, since it uses as much as digits as its factorization.

225642889897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800912598.

The product of its digits is 278691840, while the sum is 70.

The spelling of 225642889897 in words is "two hundred twenty-five billion, six hundred forty-two million, eight hundred eighty-nine thousand, eight hundred ninety-seven".