1305423220351 has 4 divisors (see below), whose sum is σ = 1305581788432. Its totient is φ = 1305264652272.

The previous prime is 1305423220331. The next prime is 1305423220369. The reversal of 1305423220351 is 1530223245031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305423220351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305423220331) 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, 79271691 + ... + 79288156.

It is an arithmetic number, because the mean of its divisors is an integer number (326395447108).

Almost surely, 2^{1305423220351} is an apocalyptic number.

1305423220351 is a deficient number, since it is larger than the sum of its proper divisors (158568081).

1305423220351 is an equidigital number, since it uses as much as digits as its factorization.

1305423220351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158568080.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1305423220351 its reverse (1530223245031), we get a palindrome (2835646465382).

The spelling of 1305423220351 in words is "one trillion, three hundred five billion, four hundred twenty-three million, two hundred twenty thousand, three hundred fifty-one".