27772227731 has 2 divisors, whose sum is σ = 27772227732. Its totient is φ = 27772227730.

The previous prime is 27772227709. The next prime is 27772227823. The reversal of 27772227731 is 13772227772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27772227731 - 2¹⁸ = 27771965587 is a prime.

It is a super-3 number, since 3×27772227731³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (27772227631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13886113865 + 13886113866.

It is an arithmetic number, because the mean of its divisors is an integer number (13886113866).

Almost surely, 2^27772227731 is an apocalyptic number.

27772227731 is a deficient number, since it is larger than the sum of its proper divisors (1).

27772227731 is an equidigital number, since it uses as much as digits as its factorization.

27772227731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806736, while the sum is 47.

The spelling of 27772227731 in words is "twenty-seven billion, seven hundred seventy-two million, two hundred twenty-seven thousand, seven hundred thirty-one".