27731840831 has 2 divisors, whose sum is σ = 27731840832. Its totient is φ = 27731840830.

The previous prime is 27731840789. The next prime is 27731840867. The reversal of 27731840831 is 13804813772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27731840831 is a prime.

It is a super-2 number, since 2×27731840831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27731840131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865920415 + 13865920416.

It is an arithmetic number, because the mean of its divisors is an integer number (13865920416).

Almost surely, 2^27731840831 is an apocalyptic number.

27731840831 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731840831 is an equidigital number, since it uses as much as digits as its factorization.

27731840831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 27731840831 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred forty thousand, eight hundred thirty-one".