505555002131 has 4 divisors (see below), whose sum is σ = 505563473712. Its totient is φ = 505546530552.

The previous prime is 505555002109. The next prime is 505555002151. The reversal of 505555002131 is 131200555505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505555002131 - 2⁶ = 505555002067 is a prime.

It is a super-2 number, since 2×505555002131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505555002101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4145636 + ... + 4265841.

It is an arithmetic number, because the mean of its divisors is an integer number (126390868428).

Almost surely, 2^505555002131 is an apocalyptic number.

505555002131 is a deficient number, since it is larger than the sum of its proper divisors (8471581).

505555002131 is an equidigital number, since it uses as much as digits as its factorization.

505555002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8471580.

The product of its (nonzero) digits is 18750, while the sum is 32.

Adding to 505555002131 its reverse (131200555505), we get a palindrome (636755557636).

The spelling of 505555002131 in words is "five hundred five billion, five hundred fifty-five million, two thousand, one hundred thirty-one".