1855930133 has 4 divisors (see below), whose sum is σ = 1856612940. Its totient is φ = 1855247328.

The previous prime is 1855930129. The next prime is 1855930147. The reversal of 1855930133 is 3310395581.

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 1339413604 + 516516529 = 36598^2 + 22727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855930133 - 2² = 1855930129 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 (1855930163) 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, 337310 + ... + 342767.

It is an arithmetic number, because the mean of its divisors is an integer number (464153235).

Almost surely, 2^1855930133 is an apocalyptic number.

It is an amenable number.

1855930133 is a deficient number, since it is larger than the sum of its proper divisors (682807).

1855930133 is an equidigital number, since it uses as much as digits as its factorization.

1855930133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682806.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1855930133 is about 43080.5075759328. The cubic root of 1855930133 is about 1228.9113095665.

The spelling of 1855930133 in words is "one billion, eight hundred fifty-five million, nine hundred thirty thousand, one hundred thirty-three".