1916312533 has 8 divisors (see below), whose sum is σ = 1932229080. Its totient is φ = 1900462080.

The previous prime is 1916312527. The next prime is 1916312537. The reversal of 1916312533 is 3352136191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1566734724 + 349577809 = 39582^2 + 18697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1916312533 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 (1916312537) 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 7 ways as a sum of consecutive naturals, for example, 42573 + ... + 75133.

It is an arithmetic number, because the mean of its divisors is an integer number (241528635).

Almost surely, 2^1916312533 is an apocalyptic number.

It is an amenable number.

1916312533 is a deficient number, since it is larger than the sum of its proper divisors (15916547).

1916312533 is a wasteful number, since it uses less digits than its factorization.

1916312533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33047.

The product of its digits is 14580, while the sum is 34.

The square root of 1916312533 is about 43775.7071102227. The cubic root of 1916312533 is about 1242.0968106948.

The spelling of 1916312533 in words is "one billion, nine hundred sixteen million, three hundred twelve thousand, five hundred thirty-three".