505121315354531 has 4 divisors (see below), whose sum is σ = 505121404827000. Its totient is φ = 505121225882064.

The previous prime is 505121315354527. The next prime is 505121315354543. The reversal of 505121315354531 is 135453513121505.

It is a happy number.

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 505121315354531 - 2² = 505121315354527 is a prime.

It is a super-2 number, since 2×505121315354531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505121315354231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35653181 + ... + 47763918.

It is an arithmetic number, because the mean of its divisors is an integer number (126280351206750).

Almost surely, 2^{505121315354531} is an apocalyptic number.

505121315354531 is a deficient number, since it is larger than the sum of its proper divisors (89472469).

505121315354531 is an equidigital number, since it uses as much as digits as its factorization.

505121315354531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89472468.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 505121315354531 in words is "five hundred five trillion, one hundred twenty-one billion, three hundred fifteen million, three hundred fifty-four thousand, five hundred thirty-one".