226515203172 has 36 divisors (see below), whose sum is σ = 606261280716. Its totient is φ = 71063592960.

The previous prime is 226515203171. The next prime is 226515203237. The reversal of 226515203172 is 271302515622.

226515203172 is a `hidden beast` number, since 2 + 2 + 65 + 1 + 520 + 3 + 1 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 136799378496 + 89715824676 = 369864^2 + 299526^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×226515203172³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (226515203171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185060829 + ... + 185062052.

It is an arithmetic number, because the mean of its divisors is an integer number (16840591131).

Almost surely, 2^226515203172 is an apocalyptic number.

It is an amenable number.

226515203172 is an abundant number, since it is smaller than the sum of its proper divisors (379746077544).

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

226515203172 is a wasteful number, since it uses less digits than its factorization.

226515203172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370122908 (or 370122903 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Adding to 226515203172 its reverse (271302515622), we get a palindrome (497817718794).

The spelling of 226515203172 in words is "two hundred twenty-six billion, five hundred fifteen million, two hundred three thousand, one hundred seventy-two".