55542012 has 12 divisors (see below), whose sum is σ = 129598056. Its totient is φ = 18514000.

The previous prime is 55541999. The next prime is 55542013. The reversal of 55542012 is 21024555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55542013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314239 + ... + 2314262.

It is an arithmetic number, because the mean of its divisors is an integer number (10799838).

Almost surely, 2^55542012 is an apocalyptic number.

It is an amenable number.

55542012 is an abundant number, since it is smaller than the sum of its proper divisors (74056044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55542012 is a wasteful number, since it uses less digits than its factorization.

55542012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628508 (or 4628506 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 55542012 is about 7452.6513402949. The cubic root of 55542012 is about 381.5404046626.

Adding to 55542012 its reverse (21024555), we get a palindrome (76566567).

The spelling of 55542012 in words is "fifty-five million, five hundred forty-two thousand, twelve".