55405201213 has 4 divisors (see below), whose sum is σ = 56344272480. Its totient is φ = 54466129948.

The previous prime is 55405201151. The next prime is 55405201223. The reversal of 55405201213 is 31210250455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55405201213 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 (55405201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469535545 + ... + 469535662.

It is an arithmetic number, because the mean of its divisors is an integer number (14086068120).

Almost surely, 2^55405201213 is an apocalyptic number.

It is an amenable number.

55405201213 is a deficient number, since it is larger than the sum of its proper divisors (939071267).

55405201213 is an equidigital number, since it uses as much as digits as its factorization.

55405201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939071266.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 55405201213 its reverse (31210250455), we get a palindrome (86615451668).

The spelling of 55405201213 in words is "fifty-five billion, four hundred five million, two hundred one thousand, two hundred thirteen".