57561145 has 8 divisors (see below), whose sum is σ = 69114240. Its totient is φ = 46021680.

The previous prime is 57561139. The next prime is 57561149. The reversal of 57561145 is 54116575.

57561145 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 not a de Polignac number, because 57561145 - 2¹³ = 57552953 is a prime.

It is a super-2 number, since 2×57561145² = 6626570827422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57561145.

It is not an unprimeable number, because it can be changed into a prime (57561149) 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, 13750 + ... + 17440.

It is an arithmetic number, because the mean of its divisors is an integer number (8639280).

Almost surely, 2^57561145 is an apocalyptic number.

It is an amenable number.

57561145 is a deficient number, since it is larger than the sum of its proper divisors (11553095).

57561145 is a wasteful number, since it uses less digits than its factorization.

57561145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815.

The product of its digits is 21000, while the sum is 34.

The square root of 57561145 is about 7586.9061546852. The cubic root of 57561145 is about 386.1088961375.

The spelling of 57561145 in words is "fifty-seven million, five hundred sixty-one thousand, one hundred forty-five".