55312213523 has 16 divisors (see below), whose sum is σ = 67012323840. Its totient is φ = 44568352896.

The previous prime is 55312213511. The next prime is 55312213547. The reversal of 55312213523 is 32531221355.

55312213523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55312213523 - 2⁴ = 55312213507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55312213523.

It is not an unprimeable number, because it can be changed into a prime (55312210523) 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, 177161 + ... + 376842.

It is an arithmetic number, because the mean of its divisors is an integer number (4188270240).

Almost surely, 2^55312213523 is an apocalyptic number.

55312213523 is a deficient number, since it is larger than the sum of its proper divisors (11700110317).

55312213523 is a wasteful number, since it uses less digits than its factorization.

55312213523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554866.

The product of its digits is 27000, while the sum is 32.

Adding to 55312213523 its reverse (32531221355), we get a palindrome (87843434878).

It can be divided in two parts, 5531221352 and 3, that added together give a palindrome (5531221355).

The spelling of 55312213523 in words is "fifty-five billion, three hundred twelve million, two hundred thirteen thousand, five hundred twenty-three".