1311303223 has 4 divisors (see below), whose sum is σ = 1312443648. Its totient is φ = 1310162800.

The previous prime is 1311303187. The next prime is 1311303233. The reversal of 1311303223 is 3223031131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223031131 = 14057 ⋅229283.

It is a cyclic number.

It is not a de Polignac number, because 1311303223 - 2¹³ = 1311295031 is a prime.

It is a super-2 number, since 2×1311303223² = 3439032285300375458, which 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 1311303223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311303233) 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, 568486 + ... + 570787.

It is an arithmetic number, because the mean of its divisors is an integer number (328110912).

Almost surely, 2^1311303223 is an apocalyptic number.

1311303223 is a deficient number, since it is larger than the sum of its proper divisors (1140425).

1311303223 is a wasteful number, since it uses less digits than its factorization.

1311303223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140424.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1311303223 is about 36211.9210067624. The cubic root of 1311303223 is about 1094.5469023278.

Adding to 1311303223 its reverse (3223031131), we get a palindrome (4534334354).

The spelling of 1311303223 in words is "one billion, three hundred eleven million, three hundred three thousand, two hundred twenty-three".