215343073 has 4 divisors (see below), whose sum is σ = 234919728. Its totient is φ = 195766420.

The previous prime is 215343059. The next prime is 215343077. The reversal of 215343073 is 370343512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215343073 - 2⁵ = 215343041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215343077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9788311 + ... + 9788332.

It is an arithmetic number, because the mean of its divisors is an integer number (58729932).

Almost surely, 2^215343073 is an apocalyptic number.

It is an amenable number.

215343073 is a deficient number, since it is larger than the sum of its proper divisors (19576655).

215343073 is a wasteful number, since it uses less digits than its factorization.

215343073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19576654.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 215343073 is about 14674.5723276694. The cubic root of 215343073 is about 599.3911165699.

Adding to 215343073 its reverse (370343512), we get a palindrome (585686585).

The spelling of 215343073 in words is "two hundred fifteen million, three hundred forty-three thousand, seventy-three".