1621352112 has 20 divisors (see below), whose sum is σ = 4188493080. Its totient is φ = 540450688.

The previous prime is 1621352053. The next prime is 1621352141. The reversal of 1621352112 is 2112531261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16889037 + ... + 16889132.

It is an arithmetic number, because the mean of its divisors is an integer number (209424654).

Almost surely, 2^1621352112 is an apocalyptic number.

1621352112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621352112 is an abundant number, since it is smaller than the sum of its proper divisors (2567140968).

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

1621352112 is a wasteful number, since it uses less digits than its factorization.

1621352112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33778180 (or 33778174 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1621352112 is about 40266.0168380236. The cubic root of 1621352112 is about 1174.7869508399.

Adding to 1621352112 its reverse (2112531261), we get a palindrome (3733883373).

The spelling of 1621352112 in words is "one billion, six hundred twenty-one million, three hundred fifty-two thousand, one hundred twelve".