55985812 has 6 divisors (see below), whose sum is σ = 97975178. Its totient is φ = 27992904.

The previous prime is 55985771. The next prime is 55985819. The reversal of 55985812 is 21858955.

It can be written as a sum of positive squares in only one way, i.e., 32307856 + 23677956 = 5684^2 + 4866^2 .

It is a super-2 number, since 2×55985812² = 6268822290598688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55985819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6998223 + ... + 6998230.

Almost surely, 2^55985812 is an apocalyptic number.

It is an amenable number.

55985812 is a deficient number, since it is larger than the sum of its proper divisors (41989366).

55985812 is a wasteful number, since it uses less digits than its factorization.

55985812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13996457 (or 13996455 counting only the distinct ones).

The product of its digits is 144000, while the sum is 43.

The square root of 55985812 is about 7482.3667378711. The cubic root of 55985812 is about 382.5539235068.

The spelling of 55985812 in words is "fifty-five million, nine hundred eighty-five thousand, eight hundred twelve".