1650000215 has 4 divisors (see below), whose sum is σ = 1980000264. Its totient is φ = 1320000168.

The previous prime is 1650000199. The next prime is 1650000217. The reversal of 1650000215 is 5120000561.

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

It is a cyclic number.

It is not a de Polignac number, because 1650000215 - 2⁴ = 1650000199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650000217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165000017 + ... + 165000026.

It is an arithmetic number, because the mean of its divisors is an integer number (495000066).

Almost surely, 2^1650000215 is an apocalyptic number.

1650000215 is a deficient number, since it is larger than the sum of its proper divisors (330000049).

1650000215 is an equidigital number, since it uses as much as digits as its factorization.

1650000215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330000048.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1650000215 is about 40620.1946696468. The cubic root of 1650000215 is about 1181.6658017924.

Adding to 1650000215 its reverse (5120000561), we get a palindrome (6770000776).

The spelling of 1650000215 in words is "one billion, six hundred fifty million, two hundred fifteen", and thus it is an aban number.