1316554243225 has 12 divisors (see below), whose sum is σ = 1758106282156. Its totient is φ = 972224671680.

The previous prime is 1316554243217. The next prime is 1316554243231. The reversal of 1316554243225 is 5223424556131.

It can be written as a sum of positive squares in 6 ways, for example, as 6635079936 + 1309919163289 = 81456^2 + 1144517^2 .

It is not a de Polignac number, because 1316554243225 - 2³ = 1316554243217 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2025467742 + ... + 2025468391.

Almost surely, 2^{1316554243225} is an apocalyptic number.

It is an amenable number.

1316554243225 is a deficient number, since it is larger than the sum of its proper divisors (441552038931).

1316554243225 is a wasteful number, since it uses less digits than its factorization.

1316554243225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050936156 (or 4050936151 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

Adding to 1316554243225 its reverse (5223424556131), we get a palindrome (6539978799356).

The spelling of 1316554243225 in words is "one trillion, three hundred sixteen billion, five hundred fifty-four million, two hundred forty-three thousand, two hundred twenty-five".