44157257 has 2 divisors, whose sum is σ = 44157258. Its totient is φ = 44157256.

The previous prime is 44157247. The next prime is 44157271. The reversal of 44157257 is 75275144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 808201 = 6584^2 + 899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44157257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44157247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22078628 + 22078629.

It is an arithmetic number, because the mean of its divisors is an integer number (22078629).

Almost surely, 2^44157257 is an apocalyptic number.

It is an amenable number.

44157257 is a deficient number, since it is larger than the sum of its proper divisors (1).

44157257 is an equidigital number, since it uses as much as digits as its factorization.

44157257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 35.

The square root of 44157257 is about 6645.0927006326. The cubic root of 44157257 is about 353.4549183047.

The spelling of 44157257 in words is "forty-four million, one hundred fifty-seven thousand, two hundred fifty-seven".