2531146442481 has 12 divisors (see below), whose sum is σ = 3667633860852. Its totient is φ = 1682107833696.

The previous prime is 2531146442449. The next prime is 2531146442609. The reversal of 2531146442481 is 1842446411352.

2531146442481 is a `hidden beast` number, since 2 + 5 + 3 + 1 + 146 + 4 + 424 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1260250966881 + 1270895475600 = 1122609^2 + 1127340^2 .

It is not a de Polignac number, because 2531146442481 - 2⁵ = 2531146442449 is a prime.

It is a super-2 number, since 2×2531146442481² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2531146442441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443590986 + ... + 443596691.

It is an arithmetic number, because the mean of its divisors is an integer number (305636155071).

Almost surely, 2^{2531146442481} is an apocalyptic number.

It is an amenable number.

2531146442481 is a deficient number, since it is larger than the sum of its proper divisors (1136487418371).

2531146442481 is a wasteful number, since it uses less digits than its factorization.

2531146442481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887188000 (or 887187997 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The spelling of 2531146442481 in words is "two trillion, five hundred thirty-one billion, one hundred forty-six million, four hundred forty-two thousand, four hundred eighty-one".