165222521230 has 64 divisors (see below), whose sum is σ = 337344860160. Its totient is φ = 57758327424.

The previous prime is 165222521209. The next prime is 165222521237. The reversal of 165222521230 is 32125222561.

It is a junction number, because it is equal to n+sod(n) for n = 165222521192 and 165222521201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165222521237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4097427 + ... + 4137553.

It is an arithmetic number, because the mean of its divisors is an integer number (5271013440).

Almost surely, 2^165222521230 is an apocalyptic number.

165222521230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165222521230 is an abundant number, since it is smaller than the sum of its proper divisors (172122338930).

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

165222521230 is a wasteful number, since it uses less digits than its factorization.

165222521230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41833.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 165222521230 its reverse (32125222561), we get a palindrome (197347743791).

The spelling of 165222521230 in words is "one hundred sixty-five billion, two hundred twenty-two million, five hundred twenty-one thousand, two hundred thirty".