55051022021243 has 4 divisors (see below), whose sum is σ = 55055441317800. Its totient is φ = 55046602724688.

The previous prime is 55051022021239. The next prime is 55051022021287. The reversal of 55051022021243 is 34212022015055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55051022021243 - 2² = 55051022021239 is a prime.

It is a super-2 number, since 2×55051022021243² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55051022021213) 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, 2209629593 + ... + 2209654506.

It is an arithmetic number, because the mean of its divisors is an integer number (13763860329450).

Almost surely, 2^{55051022021243} is an apocalyptic number.

55051022021243 is a deficient number, since it is larger than the sum of its proper divisors (4419296557).

55051022021243 is a wasteful number, since it uses less digits than its factorization.

55051022021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419296556.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 55051022021243 its reverse (34212022015055), we get a palindrome (89263044036298).

The spelling of 55051022021243 in words is "fifty-five trillion, fifty-one billion, twenty-two million, twenty-one thousand, two hundred forty-three".