215340523 has 2 divisors, whose sum is σ = 215340524. Its totient is φ = 215340522.

The previous prime is 215340497. The next prime is 215340529. The reversal of 215340523 is 325043512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215340523 is a prime.

It is not a weakly prime, because it can be changed into another prime (215340529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107670261 + 107670262.

It is an arithmetic number, because the mean of its divisors is an integer number (107670262).

Almost surely, 2^215340523 is an apocalyptic number.

215340523 is a deficient number, since it is larger than the sum of its proper divisors (1).

215340523 is an equidigital number, since it uses as much as digits as its factorization.

215340523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 215340523 is about 14674.4854424269. The cubic root of 215340523 is about 599.3887506500.

The spelling of 215340523 in words is "two hundred fifteen million, three hundred forty thousand, five hundred twenty-three".