1531260228481 has 3 divisors (see below), whose sum is σ = 1531261465923. Its totient is φ = 1531258991040.

The previous prime is 1531260228427. The next prime is 1531260228503. The reversal of 1531260228481 is 1848220621351.

The square root of 1531260228481 is 1237441.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1347013250881 + 184246977600 = 1160609^2 + 429240^2 .

It is not a de Polignac number, because 1531260228481 - 2³⁹ = 981504414593 is a prime.

It is a super-2 number, since 2×1531260228481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1531260228401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 618721 + ... + 1856161.

It is an arithmetic number, because the mean of its divisors is an integer number (510420488641).

Almost surely, 2^{1531260228481} is an apocalyptic number.

1531260228481 is the 1237441-st square number.

1531260228481 is the 618721-st centered octagonal number.

It is an amenable number.

1531260228481 is a deficient number, since it is larger than the sum of its proper divisors (1237442).

1531260228481 is an frugal number, since it uses more digits than its factorization.

1531260228481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474882 (or 1237441 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 1531260228481 in words is "one trillion, five hundred thirty-one billion, two hundred sixty million, two hundred twenty-eight thousand, four hundred eighty-one".