57445521 has 8 divisors (see below), whose sum is σ = 87536064. Its totient is φ = 32826000.

The previous prime is 57445501. The next prime is 57445523. The reversal of 57445521 is 12554475.

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

It is not a de Polignac number, because 57445521 - 2⁵ = 57445489 is a prime.

It is a super-2 number, since 2×57445521² = 6599975765922882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (57445523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367730 + ... + 1367771.

It is an arithmetic number, because the mean of its divisors is an integer number (10942008).

Almost surely, 2^57445521 is an apocalyptic number.

It is an amenable number.

57445521 is a deficient number, since it is larger than the sum of its proper divisors (30090543).

57445521 is a wasteful number, since it uses less digits than its factorization.

57445521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735511.

The product of its digits is 28000, while the sum is 33.

The square root of 57445521 is about 7579.2823538908. The cubic root of 57445521 is about 385.8501951196.

Adding to 57445521 its reverse (12554475), we get a palindrome (69999996).

The spelling of 57445521 in words is "fifty-seven million, four hundred forty-five thousand, five hundred twenty-one".