55317812 has 36 divisors (see below), whose sum is σ = 109318020. Its totient is φ = 24456960.

The previous prime is 55317811. The next prime is 55317817. The reversal of 55317812 is 21871355.

It can be written as a sum of positive squares in 2 ways, for example, as 50183056 + 5134756 = 7084^2 + 2266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55317811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16364 + ... + 19452.

Almost surely, 2^55317812 is an apocalyptic number.

It is an amenable number.

55317812 is a deficient number, since it is larger than the sum of its proper divisors (54000208).

55317812 is a wasteful number, since it uses less digits than its factorization.

55317812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152 (or 3139 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 55317812 is about 7437.5945036013. The cubic root of 55317812 is about 381.0263390466.

The spelling of 55317812 in words is "fifty-five million, three hundred seventeen thousand, eight hundred twelve".