244351561 has 4 divisors (see below), whose sum is σ = 245814912. Its totient is φ = 242888212.

The previous prime is 244351559. The next prime is 244351567. The reversal of 244351561 is 165153442.

It is a happy number.

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 244351561 - 2¹ = 244351559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244351567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731425 + ... + 731758.

It is an arithmetic number, because the mean of its divisors is an integer number (61453728).

Almost surely, 2^244351561 is an apocalyptic number.

It is an amenable number.

244351561 is a deficient number, since it is larger than the sum of its proper divisors (1463351).

244351561 is a wasteful number, since it uses less digits than its factorization.

244351561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463350.

The product of its digits is 14400, while the sum is 31.

The square root of 244351561 is about 15631.7484946502. The cubic root of 244351561 is about 625.1799469056.

The spelling of 244351561 in words is "two hundred forty-four million, three hundred fifty-one thousand, five hundred sixty-one".