1851151105 has 4 divisors (see below), whose sum is σ = 2221381332. Its totient is φ = 1480920880.

The previous prime is 1851151073. The next prime is 1851151109. The reversal of 1851151105 is 5011511581.

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 871961841 + 979189264 = 29529^2 + 31292^2 .

It is not a de Polignac number, because 1851151105 - 2⁵ = 1851151073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1851151109) 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, 185115106 + ... + 185115115.

It is an arithmetic number, because the mean of its divisors is an integer number (555345333).

Almost surely, 2^1851151105 is an apocalyptic number.

It is an amenable number.

1851151105 is a deficient number, since it is larger than the sum of its proper divisors (370230227).

1851151105 is an equidigital number, since it uses as much as digits as its factorization.

1851151105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370230226.

The product of its (nonzero) digits is 1000, while the sum is 28.

The square root of 1851151105 is about 43025.0055781519. The cubic root of 1851151105 is about 1227.8555855967.

Adding to 1851151105 its reverse (5011511581), we get a palindrome (6862662686).

The spelling of 1851151105 in words is "one billion, eight hundred fifty-one million, one hundred fifty-one thousand, one hundred five".