1881521312 has 24 divisors (see below), whose sum is σ = 4040995392. Its totient is φ = 855236800.

The previous prime is 1881521281. The next prime is 1881521357. The reversal of 1881521312 is 2131251881.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2672264 + ... + 2672967.

It is an arithmetic number, because the mean of its divisors is an integer number (168374808).

Almost surely, 2^1881521312 is an apocalyptic number.

It is an amenable number.

1881521312 is an abundant number, since it is smaller than the sum of its proper divisors (2159474080).

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

1881521312 is a wasteful number, since it uses less digits than its factorization.

1881521312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345252 (or 5345244 counting only the distinct ones).

The product of its digits is 3840, while the sum is 32.

The square root of 1881521312 is about 43376.5064522260. The cubic root of 1881521312 is about 1234.5339774920.

The spelling of 1881521312 in words is "one billion, eight hundred eighty-one million, five hundred twenty-one thousand, three hundred twelve".