55505012 has 6 divisors (see below), whose sum is σ = 97133778. Its totient is φ = 27752504.

The previous prime is 55504997. The next prime is 55505029. The reversal of 55505012 is 21050555.

It can be written as a sum of positive squares in only one way, i.e., 50324836 + 5180176 = 7094^2 + 2276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938123 + ... + 6938130.

It is an arithmetic number, because the mean of its divisors is an integer number (16188963).

Almost surely, 2^55505012 is an apocalyptic number.

It is an amenable number.

55505012 is a deficient number, since it is larger than the sum of its proper divisors (41628766).

55505012 is a wasteful number, since it uses less digits than its factorization.

55505012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13876257 (or 13876255 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 55505012 is about 7450.1685886965. The cubic root of 55505012 is about 381.4556632187.

Adding to 55505012 its reverse (21050555), we get a palindrome (76555567).

The spelling of 55505012 in words is "fifty-five million, five hundred five thousand, twelve".