2531456641 has 12 divisors (see below), whose sum is σ = 2910745408. Its totient is φ = 2156660712.

The previous prime is 2531456579. The next prime is 2531456671. The reversal of 2531456641 is 1466541352.

2531456641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2531456641 - 2¹¹ = 2531454593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2531456641.

It is not an unprimeable number, because it can be changed into a prime (2531456671) 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, 188740 + ... + 201706.

Almost surely, 2^2531456641 is an apocalyptic number.

It is an amenable number.

2531456641 is a deficient number, since it is larger than the sum of its proper divisors (379288767).

2531456641 is an equidigital number, since it uses as much as digits as its factorization.

2531456641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13308 (or 13141 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 2531456641 is about 50313.5830666034. The cubic root of 2531456641 is about 1362.8775292067.

Adding to 2531456641 its reverse (1466541352), we get a palindrome (3997997993).

The spelling of 2531456641 in words is "two billion, five hundred thirty-one million, four hundred fifty-six thousand, six hundred forty-one".