192138215009 has 4 divisors (see below), whose sum is σ = 206918077716. Its totient is φ = 177358352304.

The previous prime is 192138214991. The next prime is 192138215011. The reversal of 192138215009 is 900512831291.

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 14846691409 + 177291523600 = 121847^2 + 421060^2 .

It is a cyclic number.

It is not a de Polignac number, because 192138215009 - 2⁸ = 192138214753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (192138215029) 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, 7389931334 + ... + 7389931359.

It is an arithmetic number, because the mean of its divisors is an integer number (51729519429).

Almost surely, 2^192138215009 is an apocalyptic number.

It is an amenable number.

192138215009 is a deficient number, since it is larger than the sum of its proper divisors (14779862707).

192138215009 is a wasteful number, since it uses less digits than its factorization.

192138215009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14779862706.

The product of its (nonzero) digits is 38880, while the sum is 41.

It can be divided in two parts, 1921382 and 15009, that added together give a palindrome (1936391).

The spelling of 192138215009 in words is "one hundred ninety-two billion, one hundred thirty-eight million, two hundred fifteen thousand, nine".