1982553143 has 2 divisors, whose sum is σ = 1982553144. Its totient is φ = 1982553142.

The previous prime is 1982553121. The next prime is 1982553193. The reversal of 1982553143 is 3413552891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1982553143 - 2¹⁰ = 1982552119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1982553143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982553113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991276571 + 991276572.

It is an arithmetic number, because the mean of its divisors is an integer number (991276572).

Almost surely, 2^1982553143 is an apocalyptic number.

1982553143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982553143 is an equidigital number, since it uses as much as digits as its factorization.

1982553143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 1982553143 is about 44525.8704912099. The cubic root of 1982553143 is about 1256.2467344849.

The spelling of 1982553143 in words is "one billion, nine hundred eighty-two million, five hundred fifty-three thousand, one hundred forty-three".