1919133242 has 24 divisors (see below), whose sum is σ = 3201440796. Its totient is φ = 861808896.

The previous prime is 1919133241. The next prime is 1919133259. The reversal of 1919133242 is 2423319191.

It can be written as a sum of positive squares in 6 ways, for example, as 1276561441 + 642571801 = 35729^2 + 25349^2 .

It is not an unprimeable number, because it can be changed into a prime (1919133241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64223 + ... + 89234.

Almost surely, 2^1919133242 is an apocalyptic number.

1919133242 is a deficient number, since it is larger than the sum of its proper divisors (1282307554).

1919133242 is a wasteful number, since it uses less digits than its factorization.

1919133242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153522 (or 153509 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 1919133242 is about 43807.9130066704. The cubic root of 1919133242 is about 1242.7059451589.

The spelling of 1919133242 in words is "one billion, nine hundred nineteen million, one hundred thirty-three thousand, two hundred forty-two".