57247561 has 8 divisors (see below), whose sum is σ = 65577024. Its totient is φ = 48955920.

The previous prime is 57247501. The next prime is 57247591. The reversal of 57247561 is 16574275.

57247561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57247561 - 2²¹ = 55150409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57247561.

It is not an unprimeable number, because it can be changed into a prime (57247501) 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 7 ways as a sum of consecutive naturals, for example, 6130 + ... + 12331.

It is an arithmetic number, because the mean of its divisors is an integer number (8197128).

Almost surely, 2^57247561 is an apocalyptic number.

It is an amenable number.

57247561 is a deficient number, since it is larger than the sum of its proper divisors (8329463).

57247561 is a wasteful number, since it uses less digits than its factorization.

57247561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18911.

The product of its digits is 58800, while the sum is 37.

The square root of 57247561 is about 7566.2117998375. The cubic root of 57247561 is about 385.4064656441.

The spelling of 57247561 in words is "fifty-seven million, two hundred forty-seven thousand, five hundred sixty-one".