215235157 has 2 divisors, whose sum is σ = 215235158. Its totient is φ = 215235156.

The previous prime is 215235133. The next prime is 215235161. The reversal of 215235157 is 751532512.

215235157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148011556 + 67223601 = 12166^2 + 8199^2 .

It is a cyclic number.

It is not a de Polignac number, because 215235157 - 2¹⁹ = 214710869 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 (215235457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107617578 + 107617579.

It is an arithmetic number, because the mean of its divisors is an integer number (107617579).

Almost surely, 2^215235157 is an apocalyptic number.

It is an amenable number.

215235157 is a deficient number, since it is larger than the sum of its proper divisors (1).

215235157 is an equidigital number, since it uses as much as digits as its factorization.

215235157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 215235157 is about 14670.8948943137. The cubic root of 215235157 is about 599.2909745052.

Adding to 215235157 its reverse (751532512), we get a palindrome (966767669).

The spelling of 215235157 in words is "two hundred fifteen million, two hundred thirty-five thousand, one hundred fifty-seven".