2135209223 has 4 divisors (see below), whose sum is σ = 2440239120. Its totient is φ = 1830179328.

The previous prime is 2135209211. The next prime is 2135209243. The reversal of 2135209223 is 3229025312.

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 2135209223 - 2⁸ = 2135208967 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 (2135209243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152514938 + ... + 152514951.

It is an arithmetic number, because the mean of its divisors is an integer number (610059780).

Almost surely, 2^2135209223 is an apocalyptic number.

2135209223 is a deficient number, since it is larger than the sum of its proper divisors (305029897).

2135209223 is an equidigital number, since it uses as much as digits as its factorization.

2135209223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305029896.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2135209223 is about 46208.3241743303. The cubic root of 2135209223 is about 1287.6963921734.

It can be divided in two parts, 2135 and 209223, that multiplied together give a triangular number (446691105 = T₂₉₈₈₉).

The spelling of 2135209223 in words is "two billion, one hundred thirty-five million, two hundred nine thousand, two hundred twenty-three".