49581257 has 4 divisors (see below), whose sum is σ = 54088656. Its totient is φ = 45073860.

The previous prime is 49581253. The next prime is 49581283. The reversal of 49581257 is 75218594.

49581257 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, 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 49581257 - 2² = 49581253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49581253) 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, 2253683 + ... + 2253704.

It is an arithmetic number, because the mean of its divisors is an integer number (13522164).

Almost surely, 2^49581257 is an apocalyptic number.

It is an amenable number.

49581257 is a deficient number, since it is larger than the sum of its proper divisors (4507399).

49581257 is a wasteful number, since it uses less digits than its factorization.

49581257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507398.

The product of its digits is 100800, while the sum is 41.

The square root of 49581257 is about 7041.3959553486. The cubic root of 49581257 is about 367.3718238116.

The spelling of 49581257 in words is "forty-nine million, five hundred eighty-one thousand, two hundred fifty-seven".