55212345221231 has 16 divisors (see below), whose sum is σ = 60810201434400. Its totient is φ = 49711307817600.

The previous prime is 55212345221207. The next prime is 55212345221309. The reversal of 55212345221231 is 13212254321255.

It is not a de Polignac number, because 55212345221231 - 2⁶ = 55212345221167 is a prime.

It is a super-2 number, since 2×55212345221231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212345221431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7028396 + ... + 12642113.

It is an arithmetic number, because the mean of its divisors is an integer number (3800637589650).

Almost surely, 2^{55212345221231} is an apocalyptic number.

55212345221231 is a deficient number, since it is larger than the sum of its proper divisors (5597856213169).

55212345221231 is a wasteful number, since it uses less digits than its factorization.

55212345221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19672970.

The product of its digits is 144000, while the sum is 38.

Adding to 55212345221231 its reverse (13212254321255), we get a palindrome (68424599542486).

The spelling of 55212345221231 in words is "fifty-five trillion, two hundred twelve billion, three hundred forty-five million, two hundred twenty-one thousand, two hundred thirty-one".