215445343 has 2 divisors, whose sum is σ = 215445344. Its totient is φ = 215445342.

The previous prime is 215445323. The next prime is 215445359. The reversal of 215445343 is 343544512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215445343 - 2¹³ = 215437151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215445323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107722671 + 107722672.

It is an arithmetic number, because the mean of its divisors is an integer number (107722672).

Almost surely, 2^215445343 is an apocalyptic number.

215445343 is a deficient number, since it is larger than the sum of its proper divisors (1).

215445343 is an equidigital number, since it uses as much as digits as its factorization.

215445343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 31.

The square root of 215445343 is about 14678.0565130401. The cubic root of 215445343 is about 599.4859884831.

Adding to 215445343 its reverse (343544512), we get a palindrome (558989855).

The spelling of 215445343 in words is "two hundred fifteen million, four hundred forty-five thousand, three hundred forty-three".