505213012131 has 64 divisors (see below), whose sum is σ = 709761761280. Its totient is φ = 319359600000.

The previous prime is 505213012123. The next prime is 505213012169. The reversal of 505213012131 is 131210312505.

It is not a de Polignac number, because 505213012131 - 2³ = 505213012123 is a prime.

It is a super-2 number, since 2×505213012131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505213012111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438933406 + ... + 438934556.

It is an arithmetic number, because the mean of its divisors is an integer number (11090027520).

Almost surely, 2^505213012131 is an apocalyptic number.

505213012131 is a deficient number, since it is larger than the sum of its proper divisors (204548749149).

505213012131 is a wasteful number, since it uses less digits than its factorization.

505213012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 505213012131 its reverse (131210312505), we get a palindrome (636423324636).

The spelling of 505213012131 in words is "five hundred five billion, two hundred thirteen million, twelve thousand, one hundred thirty-one".