2143447131 has 28 divisors (see below), whose sum is σ = 3334796072. Its totient is φ = 1224625248.

The previous prime is 2143447123. The next prime is 2143447153. The reversal of 2143447131 is 1317443412.

It is not a de Polignac number, because 2143447131 - 2³ = 2143447123 is a prime.

It is a super-3 number, since 3×2143447131³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143447181) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 349911 + ... + 355983.

Almost surely, 2^2143447131 is an apocalyptic number.

2143447131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2143447131 is a deficient number, since it is larger than the sum of its proper divisors (1191348941).

2143447131 is an frugal number, since it uses more digits than its factorization.

2143447131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6083 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 2143447131 is about 46297.3771503311. The cubic root of 2143447131 is about 1289.3502990011.

The spelling of 2143447131 in words is "two billion, one hundred forty-three million, four hundred forty-seven thousand, one hundred thirty-one".