1331734312553 has 4 divisors (see below), whose sum is σ = 1356861375108. Its totient is φ = 1306607250000.

The previous prime is 1331734312541. The next prime is 1331734312567. The reversal of 1331734312553 is 3552134371331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 669053653849 + 662680658704 = 817957^2 + 814052^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331734312553 - 2²⁰ = 1331733263977 is a prime.

It is a super-2 number, since 2×1331734312553² (a number of 25 digits) 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 1331734312553.

It is not an unprimeable number, because it can be changed into a prime (1331734302553) 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, 12563531198 + ... + 12563531303.

It is an arithmetic number, because the mean of its divisors is an integer number (339215343777).

Almost surely, 2^{1331734312553} is an apocalyptic number.

It is an amenable number.

1331734312553 is a deficient number, since it is larger than the sum of its proper divisors (25127062555).

1331734312553 is an equidigital number, since it uses as much as digits as its factorization.

1331734312553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25127062554.

The product of its digits is 340200, while the sum is 41.

Adding to 1331734312553 its reverse (3552134371331), we get a palindrome (4883868683884).

The spelling of 1331734312553 in words is "one trillion, three hundred thirty-one billion, seven hundred thirty-four million, three hundred twelve thousand, five hundred fifty-three".