57016991 has 4 divisors (see below), whose sum is σ = 57332184. Its totient is φ = 56701800.

The previous prime is 57016979. The next prime is 57017021. The reversal of 57016991 is 19961075.

57016991 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 57016991 - 2¹⁸ = 56754847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57016391) 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, 157325 + ... + 157686.

It is an arithmetic number, because the mean of its divisors is an integer number (14333046).

Almost surely, 2^57016991 is an apocalyptic number.

57016991 is a deficient number, since it is larger than the sum of its proper divisors (315193).

57016991 is a wasteful number, since it uses less digits than its factorization.

57016991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315192.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 57016991 is about 7550.9596078909. The cubic root of 57016991 is about 384.8883490262. Note that the first 3 decimals are identical.

The spelling of 57016991 in words is "fifty-seven million, sixteen thousand, nine hundred ninety-one".