57212773 has 4 divisors (see below), whose sum is σ = 57229900. Its totient is φ = 57195648.

The previous prime is 57212759. The next prime is 57212777. The reversal of 57212773 is 37721275.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47983329 + 9229444 = 6927^2 + 3038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57212773 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 (57212777) 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 3 ways as a sum of consecutive naturals, for example, 1740 + ... + 10837.

It is an arithmetic number, because the mean of its divisors is an integer number (14307475).

Almost surely, 2^57212773 is an apocalyptic number.

It is an amenable number.

57212773 is a deficient number, since it is larger than the sum of its proper divisors (17127).

57212773 is a wasteful number, since it uses less digits than its factorization.

57212773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126.

The product of its digits is 20580, while the sum is 34.

The square root of 57212773 is about 7563.9125457662. The cubic root of 57212773 is about 385.3283823359.

The spelling of 57212773 in words is "fifty-seven million, two hundred twelve thousand, seven hundred seventy-three".