216610157 has 2 divisors, whose sum is σ = 216610158. Its totient is φ = 216610156.

The previous prime is 216610153. The next prime is 216610187. The reversal of 216610157 is 751016612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199685161 + 16924996 = 14131^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 216610157 - 2² = 216610153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216610153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108305078 + 108305079.

It is an arithmetic number, because the mean of its divisors is an integer number (108305079).

Almost surely, 2^216610157 is an apocalyptic number.

It is an amenable number.

216610157 is a deficient number, since it is larger than the sum of its proper divisors (1).

216610157 is an equidigital number, since it uses as much as digits as its factorization.

216610157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 216610157 is about 14717.6817807697. The cubic root of 216610157 is about 600.5644290518.

Adding to 216610157 its reverse (751016612), we get a palindrome (967626769).

The spelling of 216610157 in words is "two hundred sixteen million, six hundred ten thousand, one hundred fifty-seven".