1981230212 has 48 divisors (see below), whose sum is σ = 4021957632. Its totient is φ = 846426240.

The previous prime is 1981230211. The next prime is 1981230233. The reversal of 1981230212 is 2120321891.

It is a super-3 number, since 3×1981230212³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1981230211) 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, 10358 + ... + 63794.

It is an arithmetic number, because the mean of its divisors is an integer number (83790784).

Almost surely, 2^1981230212 is an apocalyptic number.

It is an amenable number.

1981230212 is an abundant number, since it is smaller than the sum of its proper divisors (2040727420).

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

1981230212 is a wasteful number, since it uses less digits than its factorization.

1981230212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53508 (or 53506 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1981230212 is about 44511.0122553959. The cubic root of 1981230212 is about 1255.9672468030.

The spelling of 1981230212 in words is "one billion, nine hundred eighty-one million, two hundred thirty thousand, two hundred twelve".