244136561 has 2 divisors, whose sum is σ = 244136562. Its totient is φ = 244136560.

The previous prime is 244136551. The next prime is 244136573. The reversal of 244136561 is 165631442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233508961 + 10627600 = 15281^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 244136561 - 2¹⁰ = 244135537 is a prime.

It is a nialpdrome in base 5.

It is not a weakly prime, because it can be changed into another prime (244136551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122068280 + 122068281.

It is an arithmetic number, because the mean of its divisors is an integer number (122068281).

Almost surely, 2^244136561 is an apocalyptic number.

It is an amenable number.

244136561 is a deficient number, since it is larger than the sum of its proper divisors (1).

244136561 is an equidigital number, since it uses as much as digits as its factorization.

244136561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 244136561 is about 15624.8699514588. The cubic root of 244136561 is about 624.9965320341.

The spelling of 244136561 in words is "two hundred forty-four million, one hundred thirty-six thousand, five hundred sixty-one".