1912238081 has 8 divisors (see below), whose sum is σ = 2180470824. Its totient is φ = 1661310720.

The previous prime is 1912238051. The next prime is 1912238117. The reversal of 1912238081 is 1808322191.

It can be written as a sum of positive squares in 4 ways, for example, as 99181681 + 1813056400 = 9959^2 + 42580^2 .

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

It is not a de Polignac number, because 1912238081 - 2¹⁰ = 1912237057 is a prime.

It is a super-2 number, since 2×1912238081² = 7313308956853125122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1912238011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4326110 + ... + 4326551.

It is an arithmetic number, because the mean of its divisors is an integer number (272558853).

Almost surely, 2^1912238081 is an apocalyptic number.

It is an amenable number.

1912238081 is a deficient number, since it is larger than the sum of its proper divisors (268232743).

1912238081 is a wasteful number, since it uses less digits than its factorization.

1912238081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652691.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1912238081 is about 43729.1445262768. The cubic root of 1912238081 is about 1241.2158731681.

The spelling of 1912238081 in words is "one billion, nine hundred twelve million, two hundred thirty-eight thousand, eighty-one".