57157481 has 4 divisors (see below), whose sum is σ = 57712512. Its totient is φ = 56602452.

The previous prime is 57157421. The next prime is 57157501. The reversal of 57157481 is 18475175.

It is a happy number.

57157481 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 57157481 - 2¹⁸ = 56895337 is a prime.

It is a super-2 number, since 2×57157481² = 6533955268530722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57157421) 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, 277361 + ... + 277566.

It is an arithmetic number, because the mean of its divisors is an integer number (14428128).

Almost surely, 2^57157481 is an apocalyptic number.

It is an amenable number.

57157481 is a deficient number, since it is larger than the sum of its proper divisors (555031).

57157481 is a wasteful number, since it uses less digits than its factorization.

57157481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555030.

The product of its digits is 39200, while the sum is 38.

The square root of 57157481 is about 7560.2566755369. The cubic root of 57157481 is about 385.2042116719.

The spelling of 57157481 in words is "fifty-seven million, one hundred fifty-seven thousand, four hundred eighty-one".