2157444727 has 2 divisors, whose sum is σ = 2157444728. Its totient is φ = 2157444726.

The previous prime is 2157444697. The next prime is 2157444743. The reversal of 2157444727 is 7274447512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157444727 - 2⁷ = 2157444599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157444787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078722363 + 1078722364.

It is an arithmetic number, because the mean of its divisors is an integer number (1078722364).

Almost surely, 2^2157444727 is an apocalyptic number.

2157444727 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157444727 is an equidigital number, since it uses as much as digits as its factorization.

2157444727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 43.

The square root of 2157444727 is about 46448.3016589412. The cubic root of 2157444727 is about 1292.1508750296.

The spelling of 2157444727 in words is "two billion, one hundred fifty-seven million, four hundred forty-four thousand, seven hundred twenty-seven".