2756532421 has 2 divisors, whose sum is σ = 2756532422. Its totient is φ = 2756532420.

The previous prime is 2756532419. The next prime is 2756532433. The reversal of 2756532421 is 1242356572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849860100 + 906672321 = 43010^2 + 30111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2756532421 - 2¹ = 2756532419 is a prime.

Together with 2756532419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2756532481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378266210 + 1378266211.

It is an arithmetic number, because the mean of its divisors is an integer number (1378266211).

Almost surely, 2^2756532421 is an apocalyptic number.

It is an amenable number.

2756532421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756532421 is an equidigital number, since it uses as much as digits as its factorization.

2756532421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 37.

The square root of 2756532421 is about 52502.6896549120. The cubic root of 2756532421 is about 1402.1281275288.

Adding to 2756532421 its reverse (1242356572), we get a palindrome (3998888993).

The spelling of 2756532421 in words is "two billion, seven hundred fifty-six million, five hundred thirty-two thousand, four hundred twenty-one".