2531566641 has 8 divisors (see below), whose sum is σ = 3413348640. Its totient is φ = 1668747872.

The previous prime is 2531566619. The next prime is 2531566657. The reversal of 2531566641 is 1466651352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2531566641 - 2⁹ = 2531566129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2531566641.

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 7 ways as a sum of consecutive naturals, for example, 4740495 + ... + 4741028.

It is an arithmetic number, because the mean of its divisors is an integer number (426668580).

Almost surely, 2^2531566641 is an apocalyptic number.

It is an amenable number.

2531566641 is a deficient number, since it is larger than the sum of its proper divisors (881781999).

2531566641 is an equidigital number, since it uses as much as digits as its factorization.

2531566641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481615.

The product of its digits is 129600, while the sum is 39.

The square root of 2531566641 is about 50314.6761988985. The cubic root of 2531566641 is about 1362.8972694035.

The spelling of 2531566641 in words is "two billion, five hundred thirty-one million, five hundred sixty-six thousand, six hundred forty-one".