2202020172 has 72 divisors (see below), whose sum is σ = 6102969600. Its totient is φ = 663901920.

The previous prime is 2202020147. The next prime is 2202020209. The reversal of 2202020172 is 2710202022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64833 + ... + 92775.

Almost surely, 2^2202020172 is an apocalyptic number.

2202020172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2202020172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3051484800).

2202020172 is an abundant number, since it is smaller than the sum of its proper divisors (3900949428).

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

2202020172 is a wasteful number, since it uses less digits than its factorization.

2202020172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28163 (or 28158 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2202020172 is about 46925.6877626743. The cubic root of 2202020172 is about 1300.9894187630.

Adding to 2202020172 its reverse (2710202022), we get a palindrome (4912222194).

The spelling of 2202020172 in words is "two billion, two hundred two million, twenty thousand, one hundred seventy-two".