216161587 has 2 divisors, whose sum is σ = 216161588. Its totient is φ = 216161586.

The previous prime is 216161549. The next prime is 216161623. The reversal of 216161587 is 785161612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216161587 - 2²³ = 207772979 is a prime.

It is not a weakly prime, because it can be changed into another prime (216161527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108080793 + 108080794.

It is an arithmetic number, because the mean of its divisors is an integer number (108080794).

Almost surely, 2^216161587 is an apocalyptic number.

216161587 is a deficient number, since it is larger than the sum of its proper divisors (1).

216161587 is an equidigital number, since it uses as much as digits as its factorization.

216161587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 216161587 is about 14702.4347303431. The cubic root of 216161587 is about 600.1495802991.

The spelling of 216161587 in words is "two hundred sixteen million, one hundred sixty-one thousand, five hundred eighty-seven".