1312320553 has 8 divisors (see below), whose sum is σ = 1329300000. Its totient is φ = 1295369088.

The previous prime is 1312320533. The next prime is 1312320563. The reversal of 1312320553 is 3550232131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312320553 - 2⁵ = 1312320521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312320523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97338 + ... + 109996.

It is an arithmetic number, because the mean of its divisors is an integer number (166162500).

Almost surely, 2^1312320553 is an apocalyptic number.

It is an amenable number.

1312320553 is a deficient number, since it is larger than the sum of its proper divisors (16979447).

1312320553 is a wasteful number, since it uses less digits than its factorization.

1312320553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13991.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1312320553 is about 36225.9651769280. The cubic root of 1312320553 is about 1094.8298848202.

Adding to 1312320553 its reverse (3550232131), we get a palindrome (4862552684).

The spelling of 1312320553 in words is "one billion, three hundred twelve million, three hundred twenty thousand, five hundred fifty-three".