1620225112 has 64 divisors (see below), whose sum is σ = 3379449600. Its totient is φ = 722064000.

The previous prime is 1620225109. The next prime is 1620225119. The reversal of 1620225112 is 2115220261.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620225119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317714 + ... + 1318942.

It is an arithmetic number, because the mean of its divisors is an integer number (52803900).

Almost surely, 2^1620225112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620225112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689724800).

1620225112 is an abundant number, since it is smaller than the sum of its proper divisors (1759224488).

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

1620225112 is a wasteful number, since it uses less digits than its factorization.

1620225112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1620225112 is about 40252.0199741578. The cubic root of 1620225112 is about 1174.5146900585.

Adding to 1620225112 its reverse (2115220261), we get a palindrome (3735445373).

It can be divided in two parts, 16202 and 25112, that added together give a palindrome (41314).

The spelling of 1620225112 in words is "one billion, six hundred twenty million, two hundred twenty-five thousand, one hundred twelve".