1305223512 has 16 divisors (see below), whose sum is σ = 3263058840. Its totient is φ = 435074496.

The previous prime is 1305223499. The next prime is 1305223529. The reversal of 1305223512 is 2153225031.

It is a happy number.

It is a super-2 number, since 2×1305223512² = 3407216832555228288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 54384313 = 1305223512 / (1 + 3 + 0 + 5 + 2 + 2 + 3 + 5 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27192133 + ... + 27192180.

Almost surely, 2^1305223512 is an apocalyptic number.

1305223512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305223512 is an abundant number, since it is smaller than the sum of its proper divisors (1957835328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1305223512 is a wasteful number, since it uses less digits than its factorization.

1305223512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54384322 (or 54384318 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1305223512 is about 36127.8772141403. The cubic root of 1305223512 is about 1092.8526997909.

Adding to 1305223512 its reverse (2153225031), we get a palindrome (3458448543).

The spelling of 1305223512 in words is "one billion, three hundred five million, two hundred twenty-three thousand, five hundred twelve".