43681288631 has 2 divisors, whose sum is σ = 43681288632. Its totient is φ = 43681288630.

The previous prime is 43681288619. The next prime is 43681288633. The reversal of 43681288631 is 13688218634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43681288631 - 2¹⁰ = 43681287607 is a prime.

It is a super-2 number, since 2×43681288631² (a number of 22 digits) contains 22 as substring.

Together with 43681288633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43681288631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43681288633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21840644315 + 21840644316.

It is an arithmetic number, because the mean of its divisors is an integer number (21840644316).

Almost surely, 2^43681288631 is an apocalyptic number.

43681288631 is a deficient number, since it is larger than the sum of its proper divisors (1).

43681288631 is an equidigital number, since it uses as much as digits as its factorization.

43681288631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 50.

The spelling of 43681288631 in words is "forty-three billion, six hundred eighty-one million, two hundred eighty-eight thousand, six hundred thirty-one".