272552561 has 2 divisors, whose sum is σ = 272552562. Its totient is φ = 272552560.

The previous prime is 272552537. The next prime is 272552563. The reversal of 272552561 is 165255272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263737600 + 8814961 = 16240^2 + 2969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272552561 is a prime.

It is a Sophie Germain prime.

Together with 272552563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (272552563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136276280 + 136276281.

It is an arithmetic number, because the mean of its divisors is an integer number (136276281).

Almost surely, 2^272552561 is an apocalyptic number.

It is an amenable number.

272552561 is a deficient number, since it is larger than the sum of its proper divisors (1).

272552561 is an equidigital number, since it uses as much as digits as its factorization.

272552561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 35.

The square root of 272552561 is about 16509.1659692427. The cubic root of 272552561 is about 648.3608093568.

The spelling of 272552561 in words is "two hundred seventy-two million, five hundred fifty-two thousand, five hundred sixty-one".