228370250161 has 3 divisors (see below), whose sum is σ = 228370728043. Its totient is φ = 228369772280.

The previous prime is 228370250137. The next prime is 228370250183. The reversal of 228370250161 is 161052073822.

The square root of 228370250161 is 477881.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 227606280561 + 763969600 = 477081^2 + 27640^2 .

It is not a de Polignac number, because 228370250161 - 2⁷ = 228370250033 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 228370250161.

It is not an unprimeable number, because it can be changed into a prime (228370250461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 238941 + ... + 716821.

Almost surely, 2^228370250161 is an apocalyptic number.

228370250161 is the 477881-st square number.

228370250161 is the 238941-st centered octagonal number.

It is an amenable number.

228370250161 is a deficient number, since it is larger than the sum of its proper divisors (477882).

228370250161 is an frugal number, since it uses more digits than its factorization.

228370250161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955762 (or 477881 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 228370250161 in words is "two hundred twenty-eight billion, three hundred seventy million, two hundred fifty thousand, one hundred sixty-one".