2143445431 has 8 divisors (see below), whose sum is σ = 2214907904. Its totient is φ = 2072127960.

The previous prime is 2143445413. The next prime is 2143445443. The reversal of 2143445431 is 1345443412.

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 2143445431 - 2¹⁷ = 2143314359 is a prime.

It is a super-2 number, since 2×2143445431² = 9188716631349551522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143445393 and 2143445402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143445401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5775 + ... + 65728.

It is an arithmetic number, because the mean of its divisors is an integer number (276863488).

Almost surely, 2^2143445431 is an apocalyptic number.

2143445431 is a deficient number, since it is larger than the sum of its proper divisors (71462473).

2143445431 is an equidigital number, since it uses as much as digits as its factorization.

2143445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72501.

The product of its digits is 23040, while the sum is 31.

The square root of 2143445431 is about 46297.3587907561. The cubic root of 2143445431 is about 1289.3499581333.

Adding to 2143445431 its reverse (1345443412), we get a palindrome (3488888843).

The spelling of 2143445431 in words is "two billion, one hundred forty-three million, four hundred forty-five thousand, four hundred thirty-one".