1231452553525 has 6 divisors (see below), whose sum is σ = 1527001166402. Its totient is φ = 985162042800.

The previous prime is 1231452553493. The next prime is 1231452553537. The reversal of 1231452553525 is 5253552541321.

It can be written as a sum of positive squares in 3 ways, for example, as 395341652644 + 836110900881 = 628762^2 + 914391^2 .

It is not a de Polignac number, because 1231452553525 - 2⁵ = 1231452553493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24629051046 + ... + 24629051095.

Almost surely, 2^{1231452553525} is an apocalyptic number.

It is an amenable number.

1231452553525 is a deficient number, since it is larger than the sum of its proper divisors (295548612877).

1231452553525 is an equidigital number, since it uses as much as digits as its factorization.

1231452553525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49258102151 (or 49258102146 counting only the distinct ones).

The product of its digits is 900000, while the sum is 43.

The spelling of 1231452553525 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-two million, five hundred fifty-three thousand, five hundred twenty-five".