55253444232521 has 32 divisors (see below), whose sum is σ = 61872186700800. Its totient is φ = 49091612313600.

The previous prime is 55253444232461. The next prime is 55253444232527. The reversal of 55253444232521 is 12523244435255.

It is not a de Polignac number, because 55253444232521 - 2¹⁸ = 55253443970377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55253444232527) 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 31 ways as a sum of consecutive naturals, for example, 162941870 + ... + 163280616.

It is an arithmetic number, because the mean of its divisors is an integer number (1933505834400).

Almost surely, 2^{55253444232521} is an apocalyptic number.

It is an amenable number.

55253444232521 is a deficient number, since it is larger than the sum of its proper divisors (6618742468279).

55253444232521 is a wasteful number, since it uses less digits than its factorization.

55253444232521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346385.

The product of its digits is 5760000, while the sum is 47.

Adding to 55253444232521 its reverse (12523244435255), we get a palindrome (67776688667776).

The spelling of 55253444232521 in words is "fifty-five trillion, two hundred fifty-three billion, four hundred forty-four million, two hundred thirty-two thousand, five hundred twenty-one".