2143021431 has 8 divisors (see below), whose sum is σ = 2858571504. Its totient is φ = 1428076160.

The previous prime is 2143021429. The next prime is 2143021453. The reversal of 2143021431 is 1341203412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2143021431 - 2¹ = 2143021429 is a prime.

It is a super-2 number, since 2×2143021431² = 9185081707450575522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143021398 and 2143021407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143021031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142866 + ... + 157151.

It is an arithmetic number, because the mean of its divisors is an integer number (357321438).

Almost surely, 2^2143021431 is an apocalyptic number.

2143021431 is a deficient number, since it is larger than the sum of its proper divisors (715550073).

2143021431 is a wasteful number, since it uses less digits than its factorization.

2143021431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302401.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2143021431 is about 46292.7794693730. The cubic root of 2143021431 is about 1289.2649360741.

Adding to 2143021431 its reverse (1341203412), we get a palindrome (3484224843).

The spelling of 2143021431 in words is "two billion, one hundred forty-three million, twenty-one thousand, four hundred thirty-one".