1856233145 has 16 divisors (see below), whose sum is σ = 2539933200. Its totient is φ = 1290123264.

The previous prime is 1856233121. The next prime is 1856233163. The reversal of 1856233145 is 5413326581.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 59151481 + 1797081664 = 7691^2 + 42392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856233145 - 2¹⁰ = 1856232121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1856233099 and 1856233108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838820 + ... + 841029.

It is an arithmetic number, because the mean of its divisors is an integer number (158745825).

Almost surely, 2^1856233145 is an apocalyptic number.

It is an amenable number.

1856233145 is a deficient number, since it is larger than the sum of its proper divisors (683700055).

1856233145 is a wasteful number, since it uses less digits than its factorization.

1856233145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679884.

The product of its digits is 86400, while the sum is 38.

The square root of 1856233145 is about 43084.0242433318. The cubic root of 1856233145 is about 1228.9781861160.

The spelling of 1856233145 in words is "one billion, eight hundred fifty-six million, two hundred thirty-three thousand, one hundred forty-five".