2143431 has 6 divisors (see below), whose sum is σ = 3096080. Its totient is φ = 1428948.

The previous prime is 2143417. The next prime is 2143441. The reversal of 2143431 is 1343412.

It is not a de Polignac number, because 2143431 - 2²¹ = 46279 is a prime.

It is a super-2 number, since 2×2143431² = 9188592903522, which contains 22 as substring.

It is a Duffinian number.

2143431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119071 + ... + 119088.

2^2143431 is an apocalyptic number.

2143431 is a deficient number, since it is larger than the sum of its proper divisors (952649).

2143431 is a wasteful number, since it uses less digits than its factorization.

2143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238165 (or 238162 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 2143431 is about 1464.0461058314. The cubic root of 2143431 is about 128.9347064560.

Adding to 2143431 its reverse (1343412), we get a palindrome (3486843).

The spelling of 2143431 in words is "two million, one hundred forty-three thousand, four hundred thirty-one".