2271681388 has 12 divisors (see below), whose sum is σ = 4148287920. Its totient is φ = 1086456272.

The previous prime is 2271681371. The next prime is 2271681403. The reversal of 2271681388 is 8831861722.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12346003 + ... + 12346186.

It is an arithmetic number, because the mean of its divisors is an integer number (345690660).

Almost surely, 2^2271681388 is an apocalyptic number.

It is an amenable number.

2271681388 is a deficient number, since it is larger than the sum of its proper divisors (1876606532).

2271681388 is a wasteful number, since it uses less digits than its factorization.

2271681388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24692216 (or 24692214 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 2271681388 is about 47662.1588684357. The cubic root of 2271681388 is about 1314.5662355146.

The spelling of 2271681388 in words is "two billion, two hundred seventy-one million, six hundred eighty-one thousand, three hundred eighty-eight".