2181341072 has 10 divisors (see below), whose sum is σ = 4226348358. Its totient is φ = 1090670528.

The previous prime is 2181341069. The next prime is 2181341093. The reversal of 2181341072 is 2701431812.

It can be written as a sum of positive squares in only one way, i.e., 1765344256 + 415996816 = 42016^2 + 20396^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68166893 + ... + 68166924.

Almost surely, 2^2181341072 is an apocalyptic number.

It is an amenable number.

2181341072 is a deficient number, since it is larger than the sum of its proper divisors (2045007286).

2181341072 is a wasteful number, since it uses less digits than its factorization.

2181341072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136333825 (or 136333819 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2181341072 is about 46704.8292149752. The cubic root of 2181341072 is about 1296.9040870677.

Adding to 2181341072 its reverse (2701431812), we get a palindrome (4882772884).

The spelling of 2181341072 in words is "two billion, one hundred eighty-one million, three hundred forty-one thousand, seventy-two".