215103485 has 4 divisors (see below), whose sum is σ = 258124188. Its totient is φ = 172082784.

The previous prime is 215103481. The next prime is 215103509. The reversal of 215103485 is 584301512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156825529 + 58277956 = 12523^2 + 7634^2 .

It is a cyclic number.

It is not a de Polignac number, because 215103485 - 2² = 215103481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215103481) 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, 21510344 + ... + 21510353.

It is an arithmetic number, because the mean of its divisors is an integer number (64531047).

Almost surely, 2^215103485 is an apocalyptic number.

It is an amenable number.

215103485 is a deficient number, since it is larger than the sum of its proper divisors (43020703).

215103485 is an equidigital number, since it uses as much as digits as its factorization.

215103485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43020702.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 215103485 is about 14666.4066833018. The cubic root of 215103485 is about 599.1687424017.

Adding to 215103485 its reverse (584301512), we get a palindrome (799404997).

The spelling of 215103485 in words is "two hundred fifteen million, one hundred three thousand, four hundred eighty-five".