54512212421 has 4 divisors (see below), whose sum is σ = 54513679500. Its totient is φ = 54510745344.

The previous prime is 54512212397. The next prime is 54512212451. The reversal of 54512212421 is 12421221545.

54512212421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12421221545 = 5 ⋅2484244309.

It can be written as a sum of positive squares in 2 ways, for example, as 34230180196 + 20282032225 = 185014^2 + 142415^2 .

It is a cyclic number.

It is not a de Polignac number, because 54512212421 - 2¹⁸ = 54511950277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54512212451) 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, 676316 + ... + 752613.

It is an arithmetic number, because the mean of its divisors is an integer number (13628419875).

Almost surely, 2^54512212421 is an apocalyptic number.

It is an amenable number.

54512212421 is a deficient number, since it is larger than the sum of its proper divisors (1467079).

54512212421 is a wasteful number, since it uses less digits than its factorization.

54512212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467078.

The product of its digits is 6400, while the sum is 29.

Adding to 54512212421 its reverse (12421221545), we get a palindrome (66933433966).

The spelling of 54512212421 in words is "fifty-four billion, five hundred twelve million, two hundred twelve thousand, four hundred twenty-one".