1855231043 has 2 divisors, whose sum is σ = 1855231044. Its totient is φ = 1855231042.

The previous prime is 1855231033. The next prime is 1855231153. The reversal of 1855231043 is 3401325581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1855231043 - 2¹⁴ = 1855214659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1855231033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927615521 + 927615522.

It is an arithmetic number, because the mean of its divisors is an integer number (927615522).

Almost surely, 2^1855231043 is an apocalyptic number.

1855231043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855231043 is an equidigital number, since it uses as much as digits as its factorization.

1855231043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1855231043 is about 43072.3930493768. The cubic root of 1855231043 is about 1228.7569884734.

The spelling of 1855231043 in words is "one billion, eight hundred fifty-five million, two hundred thirty-one thousand, forty-three".