215301197 has 2 divisors, whose sum is σ = 215301198. Its totient is φ = 215301196.

The previous prime is 215301193. The next prime is 215301221. The reversal of 215301197 is 791103512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142898116 + 72403081 = 11954^2 + 8509^2 .

It is a cyclic number.

It is not a de Polignac number, because 215301197 - 2² = 215301193 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 (215301193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107650598 + 107650599.

It is an arithmetic number, because the mean of its divisors is an integer number (107650599).

Almost surely, 2^215301197 is an apocalyptic number.

It is an amenable number.

215301197 is a deficient number, since it is larger than the sum of its proper divisors (1).

215301197 is an equidigital number, since it uses as much as digits as its factorization.

215301197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 215301197 is about 14673.1454364768. The cubic root of 215301197 is about 599.3522611608.

The spelling of 215301197 in words is "two hundred fifteen million, three hundred one thousand, one hundred ninety-seven".