1431512320505 has 4 divisors (see below), whose sum is σ = 1717814784612. Its totient is φ = 1145209856400.

The previous prime is 1431512320499. The next prime is 1431512320529. The reversal of 1431512320505 is 5050232151341.

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 904347744784 + 527164575721 = 950972^2 + 726061^2 .

It is not a de Polignac number, because 1431512320505 - 2¹⁰ = 1431512319481 is a prime.

It is a super-3 number, since 3×1431512320505³ (a number of 37 digits) contains 333 as substring.

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, 143151232046 + ... + 143151232055.

It is an arithmetic number, because the mean of its divisors is an integer number (429453696153).

Almost surely, 2^{1431512320505} is an apocalyptic number.

It is an amenable number.

1431512320505 is a deficient number, since it is larger than the sum of its proper divisors (286302464107).

1431512320505 is an equidigital number, since it uses as much as digits as its factorization.

1431512320505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286302464106.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 1431512320505 its reverse (5050232151341), we get a palindrome (6481744471846).

The spelling of 1431512320505 in words is "one trillion, four hundred thirty-one billion, five hundred twelve million, three hundred twenty thousand, five hundred five".