44251561 has 4 divisors (see below), whose sum is σ = 46854612. Its totient is φ = 41648512.

The previous prime is 44251547. The next prime is 44251573. The reversal of 44251561 is 16515244.

44251561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40717161 + 3534400 = 6381^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 44251561 - 2¹³ = 44243369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44251511) 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, 1301500 + ... + 1301533.

It is an arithmetic number, because the mean of its divisors is an integer number (11713653).

Almost surely, 2^44251561 is an apocalyptic number.

It is an amenable number.

44251561 is a deficient number, since it is larger than the sum of its proper divisors (2603051).

44251561 is a wasteful number, since it uses less digits than its factorization.

44251561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603050.

The product of its digits is 4800, while the sum is 28.

The square root of 44251561 is about 6652.1846787352. The cubic root of 44251561 is about 353.7063568712.

It can be divided in two parts, 442 and 51561, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 44251561 in words is "forty-four million, two hundred fifty-one thousand, five hundred sixty-one".