2643124321 has 2 divisors, whose sum is σ = 2643124322. Its totient is φ = 2643124320.

The previous prime is 2643124279. The next prime is 2643124343. The reversal of 2643124321 is 1234213462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2124195921 + 518928400 = 46089^2 + 22780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643124321 is a prime.

It is a super-2 number, since 2×2643124321² = 13972212352523422082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2643124321.

It is not a weakly prime, because it can be changed into another prime (2643124391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321562160 + 1321562161.

It is an arithmetic number, because the mean of its divisors is an integer number (1321562161).

Almost surely, 2^2643124321 is an apocalyptic number.

It is an amenable number.

2643124321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643124321 is an equidigital number, since it uses as much as digits as its factorization.

2643124321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

The square root of 2643124321 is about 51411.3248321807. The cubic root of 2643124321 is about 1382.6296426924.

Adding to 2643124321 its reverse (1234213462), we get a palindrome (3877337783).

The spelling of 2643124321 in words is "two billion, six hundred forty-three million, one hundred twenty-four thousand, three hundred twenty-one".