1631056143 has 16 divisors (see below), whose sum is σ = 2308041216. Its totient is φ = 1021019520.

The previous prime is 1631056127. The next prime is 1631056169. The reversal of 1631056143 is 3416501361.

It is not a de Polignac number, because 1631056143 - 2⁴ = 1631056127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1631056143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631056123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15121 + ... + 59082.

It is an arithmetic number, because the mean of its divisors is an integer number (144252576).

Almost surely, 2^1631056143 is an apocalyptic number.

1631056143 is a deficient number, since it is larger than the sum of its proper divisors (676985073).

1631056143 is a wasteful number, since it uses less digits than its factorization.

1631056143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74654.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1631056143 is about 40386.3360927926. The cubic root of 1631056143 is about 1177.1260480115.

The spelling of 1631056143 in words is "one billion, six hundred thirty-one million, fifty-six thousand, one hundred forty-three".