2643273431 has 2 divisors, whose sum is σ = 2643273432. Its totient is φ = 2643273430.

The previous prime is 2643273397. The next prime is 2643273439. The reversal of 2643273431 is 1343723462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643273431 is a prime.

It is a super-2 number, since 2×2643273431² = 13973788862061023522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2643273391 and 2643273400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643273439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321636715 + 1321636716.

It is an arithmetic number, because the mean of its divisors is an integer number (1321636716).

Almost surely, 2^2643273431 is an apocalyptic number.

2643273431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643273431 is an equidigital number, since it uses as much as digits as its factorization.

2643273431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 35.

The square root of 2643273431 is about 51412.7749785985. The cubic root of 2643273431 is about 1382.6556422299.

Adding to 2643273431 its reverse (1343723462), we get a palindrome (3986996893).

The spelling of 2643273431 in words is "two billion, six hundred forty-three million, two hundred seventy-three thousand, four hundred thirty-one".