2142991872 has 180 divisors, whose sum is σ = 7195344156. Its totient is φ = 612218880.

The previous prime is 2142991871. The next prime is 2142991891. The reversal of 2142991872 is 2781992412.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142991871) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 221047 + ... + 230537.

Almost surely, 2^2142991872 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 2142991872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3597672078).

2142991872 is an abundant number, since it is smaller than the sum of its proper divisors (5052352284).

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

2142991872 is an equidigital number, since it uses as much as digits as its factorization.

2142991872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529 (or 9503 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2142991872 is about 46292.4602068199. The cubic root of 2142991872 is about 1289.2590083752.

The spelling of 2142991872 in words is "two billion, one hundred forty-two million, nine hundred ninety-one thousand, eight hundred seventy-two".