215345101 has 2 divisors, whose sum is σ = 215345102. Its totient is φ = 215345100.

The previous prime is 215345093. The next prime is 215345129. The reversal of 215345101 is 101543512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204776100 + 10569001 = 14310^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 215345101 - 2³ = 215345093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215345191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107672550 + 107672551.

It is an arithmetic number, because the mean of its divisors is an integer number (107672551).

Almost surely, 2^215345101 is an apocalyptic number.

It is an amenable number.

215345101 is a deficient number, since it is larger than the sum of its proper divisors (1).

215345101 is an equidigital number, since it uses as much as digits as its factorization.

215345101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 215345101 is about 14674.6414266244. The cubic root of 215345101 is about 599.3929981587.

Adding to 215345101 its reverse (101543512), we get a palindrome (316888613).

The spelling of 215345101 in words is "two hundred fifteen million, three hundred forty-five thousand, one hundred one".