2531566242 has 24 divisors (see below), whose sum is σ = 5501349516. Its totient is φ = 841349376.

The previous prime is 2531566241. The next prime is 2531566243. The reversal of 2531566242 is 2426651352.

2531566242 is a `hidden beast` number, since 2 + 53 + 1 + 566 + 2 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (2531566241) and next prime (2531566243).

It can be written as a sum of positive squares in 2 ways, for example, as 2437495641 + 94070601 = 49371^2 + 9699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2531566197 and 2531566206.

It is not an unprimeable number, because it can be changed into a prime (2531566241) 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, 202603 + ... + 214734.

Almost surely, 2^2531566242 is an apocalyptic number.

2531566242 is an abundant number, since it is smaller than the sum of its proper divisors (2969783274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531566242 is a wasteful number, since it uses less digits than its factorization.

2531566242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417682 (or 417679 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 2531566242 is about 50314.6722338524. The cubic root of 2531566242 is about 1362.8971978015.

The spelling of 2531566242 in words is "two billion, five hundred thirty-one million, five hundred sixty-six thousand, two hundred forty-two".