2157027647 has 4 divisors (see below), whose sum is σ = 2226609216. Its totient is φ = 2087446080.

The previous prime is 2157027583. The next prime is 2157027667. The reversal of 2157027647 is 7467207512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2157027647 - 2⁶ = 2157027583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157027667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34790738 + ... + 34790799.

It is an arithmetic number, because the mean of its divisors is an integer number (556652304).

Almost surely, 2^2157027647 is an apocalyptic number.

2157027647 is a deficient number, since it is larger than the sum of its proper divisors (69581569).

2157027647 is an equidigital number, since it uses as much as digits as its factorization.

2157027647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69581568.

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 2157027647 is about 46443.8117191085. The cubic root of 2157027647 is about 1292.0676029048.

The spelling of 2157027647 in words is "two billion, one hundred fifty-seven million, twenty-seven thousand, six hundred forty-seven".