244407561 has 4 divisors (see below), whose sum is σ = 325876752. Its totient is φ = 162938372.

The previous prime is 244407557. The next prime is 244407643. The reversal of 244407561 is 165704442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 244407561 - 2² = 244407557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (244407511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40734591 + ... + 40734596.

It is an arithmetic number, because the mean of its divisors is an integer number (81469188).

Almost surely, 2^244407561 is an apocalyptic number.

It is an amenable number.

244407561 is a deficient number, since it is larger than the sum of its proper divisors (81469191).

244407561 is an equidigital number, since it uses as much as digits as its factorization.

244407561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81469190.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 244407561 is about 15633.5396183974. The cubic root of 244407561 is about 625.2277024192.

The spelling of 244407561 in words is "two hundred forty-four million, four hundred seven thousand, five hundred sixty-one".