57005531 has 8 divisors (see below), whose sum is σ = 62976000. Its totient is φ = 51166440.

The previous prime is 57005527. The next prime is 57005551. The reversal of 57005531 is 13550075.

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 57005531 - 2² = 57005527 is a prime.

It is a super-2 number, since 2×57005531² = 6499261129183922, which contains 22 as substring.

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 57005531.

It is not an unprimeable number, because it can be changed into a prime (57005521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31931 + ... + 33668.

It is an arithmetic number, because the mean of its divisors is an integer number (7872000).

Almost surely, 2^57005531 is an apocalyptic number.

57005531 is a deficient number, since it is larger than the sum of its proper divisors (5970469).

57005531 is a wasteful number, since it uses less digits than its factorization.

57005531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65689.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 57005531 is about 7550.2007258086. The cubic root of 57005531 is about 384.8625607132.

The spelling of 57005531 in words is "fifty-seven million, five thousand, five hundred thirty-one".