16252220 has 36 divisors (see below), whose sum is σ = 36036504. Its totient is φ = 6156000.

The previous prime is 16252217. The next prime is 16252231. The reversal of 16252220 is 2225261.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 16252192 and 16252201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6095 + ... + 8345.

It is an arithmetic number, because the mean of its divisors is an integer number (1001014).

Almost surely, 2^16252220 is an apocalyptic number.

16252220 is a gapful number since it is divisible by the number (10) 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 16252220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18018252).

16252220 is an abundant number, since it is smaller than the sum of its proper divisors (19784284).

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

16252220 is a wasteful number, since it uses less digits than its factorization.

16252220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298 (or 2277 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 16252220 is about 4031.4042218562. The cubic root of 16252220 is about 253.3013848600.

Adding to 16252220 its reverse (2225261), we get a palindrome (18477481).

The spelling of 16252220 in words is "sixteen million, two hundred fifty-two thousand, two hundred twenty".