215236157 has 2 divisors, whose sum is σ = 215236158. Its totient is φ = 215236156.

The previous prime is 215236117. The next prime is 215236163. The reversal of 215236157 is 751632512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184389241 + 30846916 = 13579^2 + 5554^2 .

It is a cyclic number.

It is not a de Polignac number, because 215236157 - 2¹⁰ = 215235133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215236117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107618078 + 107618079.

It is an arithmetic number, because the mean of its divisors is an integer number (107618079).

Almost surely, 2^215236157 is an apocalyptic number.

It is an amenable number.

215236157 is a deficient number, since it is larger than the sum of its proper divisors (1).

215236157 is an equidigital number, since it uses as much as digits as its factorization.

215236157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 215236157 is about 14670.9289753580. The cubic root of 215236157 is about 599.2919026219.

Adding to 215236157 its reverse (751632512), we get a palindrome (966868669).

The spelling of 215236157 in words is "two hundred fifteen million, two hundred thirty-six thousand, one hundred fifty-seven".