2143252431 has 12 divisors (see below), whose sum is σ = 3101735208. Its totient is φ = 1426099824.

The previous prime is 2143252427. The next prime is 2143252451. The reversal of 2143252431 is 1342523412.

It is not a de Polignac number, because 2143252431 - 2² = 2143252427 is a prime.

It is a super-2 number, since 2×2143252431² = 9187061965974819522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143252395 and 2143252404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143252451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222960 + ... + 232373.

It is an arithmetic number, because the mean of its divisors is an integer number (258477934).

Almost surely, 2^2143252431 is an apocalyptic number.

2143252431 is a deficient number, since it is larger than the sum of its proper divisors (958482777).

2143252431 is a wasteful number, since it uses less digits than its factorization.

2143252431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455862 (or 455859 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 2143252431 is about 46295.2743916698. The cubic root of 2143252431 is about 1289.3112584449.

Adding to 2143252431 its reverse (1342523412), we get a palindrome (3485775843).

The spelling of 2143252431 in words is "two billion, one hundred forty-three million, two hundred fifty-two thousand, four hundred thirty-one".