2171561627 has 2 divisors, whose sum is σ = 2171561628. Its totient is φ = 2171561626.

The previous prime is 2171561599. The next prime is 2171561647. The reversal of 2171561627 is 7261651712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171561627 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171561647) by changing a digit.

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 as a sum of consecutive naturals, namely, 1085780813 + 1085780814.

It is an arithmetic number, because the mean of its divisors is an integer number (1085780814).

Almost surely, 2^2171561627 is an apocalyptic number.

2171561627 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171561627 is an equidigital number, since it uses as much as digits as its factorization.

2171561627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 38.

The square root of 2171561627 is about 46600.0174570783. The cubic root of 2171561627 is about 1294.9630788060.

The spelling of 2171561627 in words is "two billion, one hundred seventy-one million, five hundred sixty-one thousand, six hundred twenty-seven".