1305423140431 has 4 divisors (see below), whose sum is σ = 1337262729264. Its totient is φ = 1273583551600.

The previous prime is 1305423140393. The next prime is 1305423140443. The reversal of 1305423140431 is 1340413245031.

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 1305423140431 - 2¹³ = 1305423132239 is a prime.

It is a super-2 number, since 2×1305423140431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1305423140393 and 1305423140402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305423141431) 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, 15919794355 + ... + 15919794436.

It is an arithmetic number, because the mean of its divisors is an integer number (334315682316).

Almost surely, 2^{1305423140431} is an apocalyptic number.

1305423140431 is a deficient number, since it is larger than the sum of its proper divisors (31839588833).

1305423140431 is an equidigital number, since it uses as much as digits as its factorization.

1305423140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31839588832.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 1305423140431 its reverse (1340413245031), we get a palindrome (2645836385462).

The spelling of 1305423140431 in words is "one trillion, three hundred five billion, four hundred twenty-three million, one hundred forty thousand, four hundred thirty-one".