57156919 has 4 divisors (see below), whose sum is σ = 57499344. Its totient is φ = 56814496.

The previous prime is 57156859. The next prime is 57156929. The reversal of 57156919 is 91965175.

57156919 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.

It is a cyclic number.

It is not a de Polignac number, because 57156919 - 2¹³ = 57148727 is a prime.

It is a super-2 number, since 2×57156919² = 6533826779145122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57156929) 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, 170962 + ... + 171295.

It is an arithmetic number, because the mean of its divisors is an integer number (14374836).

Almost surely, 2^57156919 is an apocalyptic number.

57156919 is a deficient number, since it is larger than the sum of its proper divisors (342425).

57156919 is a wasteful number, since it uses less digits than its factorization.

57156919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342424.

The product of its digits is 85050, while the sum is 43.

The square root of 57156919 is about 7560.2195073953. The cubic root of 57156919 is about 385.2029491631.

The spelling of 57156919 in words is "fifty-seven million, one hundred fifty-six thousand, nine hundred nineteen".