55205503112531 has 16 divisors (see below), whose sum is σ = 56816059694016. Its totient is φ = 53601192377856.

The previous prime is 55205503112521. The next prime is 55205503112533. The reversal of 55205503112531 is 13521130550255.

It is a cyclic number.

It is not a de Polignac number, because 55205503112531 - 2¹⁴ = 55205503096147 is a prime.

It is a super-2 number, since 2×55205503112531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55205503112533) 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, 816893615 + ... + 816961191.

It is an arithmetic number, because the mean of its divisors is an integer number (3551003730876).

Almost surely, 2^{55205503112531} is an apocalyptic number.

55205503112531 is a deficient number, since it is larger than the sum of its proper divisors (1610556581485).

55205503112531 is a wasteful number, since it uses less digits than its factorization.

55205503112531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113438.

The product of its (nonzero) digits is 112500, while the sum is 38.

Adding to 55205503112531 its reverse (13521130550255), we get a palindrome (68726633662786).

The spelling of 55205503112531 in words is "fifty-five trillion, two hundred five billion, five hundred three million, one hundred twelve thousand, five hundred thirty-one".