1305430312231 has 4 divisors (see below), whose sum is σ = 1306418527264. Its totient is φ = 1304442097200.

The previous prime is 1305430312217. The next prime is 1305430312243. The reversal of 1305430312231 is 1322130345031.

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 1305430312231 - 2²⁵ = 1305396757799 is a prime.

It is a super-2 number, since 2×1305430312231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305430312231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305430312211) 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, 494105535 + ... + 494108176.

It is an arithmetic number, because the mean of its divisors is an integer number (326604631816).

Almost surely, 2^{1305430312231} is an apocalyptic number.

1305430312231 is a deficient number, since it is larger than the sum of its proper divisors (988215033).

1305430312231 is an equidigital number, since it uses as much as digits as its factorization.

1305430312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988215032.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 1305430312231 its reverse (1322130345031), we get a palindrome (2627560657262).

It can be divided in two parts, 1305 and 430312231, that added together give a square (430313536 = 20744²).

The spelling of 1305430312231 in words is "one trillion, three hundred five billion, four hundred thirty million, three hundred twelve thousand, two hundred thirty-one".