1505131213505 has 4 divisors (see below), whose sum is σ = 1806157456212. Its totient is φ = 1204104970800.

The previous prime is 1505131213471. The next prime is 1505131213513. The reversal of 1505131213505 is 5053121315051.

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

It can be written as a sum of positive squares in 2 ways, for example, as 164498381056 + 1340632832449 = 405584^2 + 1157857^2 .

It is not a de Polignac number, because 1505131213505 - 2⁴⁰ = 405619585729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150513121346 + ... + 150513121355.

It is an arithmetic number, because the mean of its divisors is an integer number (451539364053).

Almost surely, 2^{1505131213505} is an apocalyptic number.

It is an amenable number.

1505131213505 is a deficient number, since it is larger than the sum of its proper divisors (301026242707).

1505131213505 is an equidigital number, since it uses as much as digits as its factorization.

1505131213505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301026242706.

The product of its (nonzero) digits is 11250, while the sum is 32.

Adding to 1505131213505 its reverse (5053121315051), we get a palindrome (6558252528556).

The spelling of 1505131213505 in words is "one trillion, five hundred five billion, one hundred thirty-one million, two hundred thirteen thousand, five hundred five".