57212212 has 12 divisors (see below), whose sum is σ = 102827620. Its totient is φ = 27832896.

The previous prime is 57212209. The next prime is 57212227. The reversal of 57212212 is 21221275.

It can be written as a sum of positive squares in 2 ways, for example, as 47251876 + 9960336 = 6874^2 + 3156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193137 + ... + 193432.

Almost surely, 2^57212212 is an apocalyptic number.

It is an amenable number.

57212212 is a deficient number, since it is larger than the sum of its proper divisors (45615408).

57212212 is a wasteful number, since it uses less digits than its factorization.

57212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386610 (or 386608 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 57212212 is about 7563.8754616929. The cubic root of 57212212 is about 385.3271228856.

Adding to 57212212 its reverse (21221275), we get a palindrome (78433487).

The spelling of 57212212 in words is "fifty-seven million, two hundred twelve thousand, two hundred twelve".