1653012215 has 4 divisors (see below), whose sum is σ = 1983614664. Its totient is φ = 1322409768.

The previous prime is 1653012199. The next prime is 1653012223. The reversal of 1653012215 is 5122103561.

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 1653012215 - 2⁴ = 1653012199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165301217 + ... + 165301226.

It is an arithmetic number, because the mean of its divisors is an integer number (495903666).

Almost surely, 2^1653012215 is an apocalyptic number.

1653012215 is a deficient number, since it is larger than the sum of its proper divisors (330602449).

1653012215 is an equidigital number, since it uses as much as digits as its factorization.

1653012215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330602448.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1653012215 is about 40657.2529199896. The cubic root of 1653012215 is about 1182.3843903621.

Adding to 1653012215 its reverse (5122103561), we get a palindrome (6775115776).

The spelling of 1653012215 in words is "one billion, six hundred fifty-three million, twelve thousand, two hundred fifteen".