2541643631 has 2 divisors, whose sum is σ = 2541643632. Its totient is φ = 2541643630.

The previous prime is 2541643609. The next prime is 2541643649. The reversal of 2541643631 is 1363461452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2541643631 - 2³⁰ = 1467901807 is a prime.

It is a super-2 number, since 2×2541643631² = 12919904694005728322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2541643591 and 2541643600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2541643651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270821815 + 1270821816.

It is an arithmetic number, because the mean of its divisors is an integer number (1270821816).

Almost surely, 2^2541643631 is an apocalyptic number.

2541643631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541643631 is an equidigital number, since it uses as much as digits as its factorization.

2541643631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 2541643631 is about 50414.7164129681. The cubic root of 2541643631 is about 1364.7032287864.

The spelling of 2541643631 in words is "two billion, five hundred forty-one million, six hundred forty-three thousand, six hundred thirty-one".