225162161 has 8 divisors (see below), whose sum is σ = 272465280. Its totient is φ = 181643328.

The previous prime is 225162107. The next prime is 225162173. The reversal of 225162161 is 161261522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225162161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225162161.

It is not an unprimeable number, because it can be changed into a prime (225162191) 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 7 ways as a sum of consecutive naturals, for example, 945941 + ... + 946178.

It is an arithmetic number, because the mean of its divisors is an integer number (34058160).

Almost surely, 2^225162161 is an apocalyptic number.

It is an amenable number.

225162161 is a deficient number, since it is larger than the sum of its proper divisors (47303119).

225162161 is a wasteful number, since it uses less digits than its factorization.

225162161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892143.

The product of its digits is 1440, while the sum is 26.

The square root of 225162161 is about 15005.4043930845. The cubic root of 225162161 is about 608.3662823879.

The spelling of 225162161 in words is "two hundred twenty-five million, one hundred sixty-two thousand, one hundred sixty-one".