2181251076 has 12 divisors (see below), whose sum is σ = 5089585872. Its totient is φ = 727083688.

The previous prime is 2181251057. The next prime is 2181251089. The reversal of 2181251076 is 6701521812.

It is a tau number, because it is divible by the number of its divisors (12).

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, 90885450 + ... + 90885473.

It is an arithmetic number, because the mean of its divisors is an integer number (424132156).

Almost surely, 2^2181251076 is an apocalyptic number.

It is an amenable number.

2181251076 is an abundant number, since it is smaller than the sum of its proper divisors (2908334796).

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

2181251076 is a wasteful number, since it uses less digits than its factorization.

2181251076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181770930 (or 181770928 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 2181251076 is about 46703.8657500640. The cubic root of 2181251076 is about 1296.8862512836.

Adding to 2181251076 its reverse (6701521812), we get a palindrome (8882772888).

The spelling of 2181251076 in words is "two billion, one hundred eighty-one million, two hundred fifty-one thousand, seventy-six".