55312021372242 has 16 divisors (see below), whose sum is σ = 110977474194720. Its totient is φ = 18378435215712.

The previous prime is 55312021372219. The next prime is 55312021372249. The reversal of 55312021372242 is 24227312021355.

55312021372242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55312021372242.

It is not an unprimeable number, because it can be changed into a prime (55312021372249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14726308392 + ... + 14726312147.

It is an arithmetic number, because the mean of its divisors is an integer number (6936092137170).

Almost surely, 2^{55312021372242} is an apocalyptic number.

55312021372242 is an abundant number, since it is smaller than the sum of its proper divisors (55665452822478).

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

55312021372242 is a wasteful number, since it uses less digits than its factorization.

55312021372242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29452620857.

The product of its (nonzero) digits is 201600, while the sum is 39.

Adding to 55312021372242 its reverse (24227312021355), we get a palindrome (79539333393597).

The spelling of 55312021372242 in words is "fifty-five trillion, three hundred twelve billion, twenty-one million, three hundred seventy-two thousand, two hundred forty-two".