1311253547 has 2 divisors, whose sum is σ = 1311253548. Its totient is φ = 1311253546.

The previous prime is 1311253523. The next prime is 1311253553. The reversal of 1311253547 is 7453521131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311253547 - 2¹⁸ = 1310991403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311253507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655626773 + 655626774.

It is an arithmetic number, because the mean of its divisors is an integer number (655626774).

Almost surely, 2^1311253547 is an apocalyptic number.

1311253547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311253547 is an equidigital number, since it uses as much as digits as its factorization.

1311253547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 1311253547 is about 36211.2350935452. The cubic root of 1311253547 is about 1094.5330806076.

Adding to 1311253547 its reverse (7453521131), we get a palindrome (8764774678).

The spelling of 1311253547 in words is "one billion, three hundred eleven million, two hundred fifty-three thousand, five hundred forty-seven".