1681471143 has 40 divisors (see below), whose sum is σ = 2859348096. Its totient is φ = 974754000.

The previous prime is 1681471133. The next prime is 1681471147. The reversal of 1681471143 is 3411741861.

It is not a de Polignac number, because 1681471143 - 2⁶ = 1681471079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1681471098 and 1681471107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681471147) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20533 + ... + 61518.

Almost surely, 2^1681471143 is an apocalyptic number.

1681471143 is a deficient number, since it is larger than the sum of its proper divisors (1177876953).

1681471143 is a wasteful number, since it uses less digits than its factorization.

1681471143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82097 (or 82088 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 1681471143 is about 41005.7452438070. The cubic root of 1681471143 is about 1189.1312876952.

The spelling of 1681471143 in words is "one billion, six hundred eighty-one million, four hundred seventy-one thousand, one hundred forty-three".