2157788327 has 2 divisors, whose sum is σ = 2157788328. Its totient is φ = 2157788326.

The previous prime is 2157788299. The next prime is 2157788389. The reversal of 2157788327 is 7238877512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157788327 - 2¹² = 2157784231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157784327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078894163 + 1078894164.

It is an arithmetic number, because the mean of its divisors is an integer number (1078894164).

Almost surely, 2^2157788327 is an apocalyptic number.

2157788327 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157788327 is an equidigital number, since it uses as much as digits as its factorization.

2157788327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The square root of 2157788327 is about 46452.0002475674. Note that the first 3 decimals coincide. The cubic root of 2157788327 is about 1292.2194684397.

The spelling of 2157788327 in words is "two billion, one hundred fifty-seven million, seven hundred eighty-eight thousand, three hundred twenty-seven".