2157027747 has 8 divisors (see below), whose sum is σ = 3286899456. Its totient is φ = 1232587272.

The previous prime is 2157027731. The next prime is 2157027757. The reversal of 2157027747 is 7477207512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2157027747 - 2⁴ = 2157027731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2157027699 and 2157027708.

It is not an unprimeable number, because it can be changed into a prime (2157027707) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 51357783 + ... + 51357824.

It is an arithmetic number, because the mean of its divisors is an integer number (410862432).

Almost surely, 2^2157027747 is an apocalyptic number.

2157027747 is a deficient number, since it is larger than the sum of its proper divisors (1129871709).

2157027747 is a wasteful number, since it uses less digits than its factorization.

2157027747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102715617.

The product of its (nonzero) digits is 192080, while the sum is 42.

The square root of 2157027747 is about 46443.8127956782. The cubic root of 2157027747 is about 1292.0676228716.

The spelling of 2157027747 in words is "two billion, one hundred fifty-seven million, twenty-seven thousand, seven hundred forty-seven".