216071515157 has 2 divisors, whose sum is σ = 216071515158. Its totient is φ = 216071515156.

The previous prime is 216071515087. The next prime is 216071515181. The reversal of 216071515157 is 751515170612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191306512996 + 24765002161 = 437386^2 + 157369^2 .

It is a cyclic number.

It is not a de Polignac number, because 216071515157 - 2³² = 211776547861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216071535157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108035757578 + 108035757579.

It is an arithmetic number, because the mean of its divisors is an integer number (108035757579).

Almost surely, 2^216071515157 is an apocalyptic number.

It is an amenable number.

216071515157 is a deficient number, since it is larger than the sum of its proper divisors (1).

216071515157 is an equidigital number, since it uses as much as digits as its factorization.

216071515157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73500, while the sum is 41.

Adding to 216071515157 its reverse (751515170612), we get a palindrome (967586685769).

The spelling of 216071515157 in words is "two hundred sixteen billion, seventy-one million, five hundred fifteen thousand, one hundred fifty-seven".