81055127 has 2 divisors, whose sum is σ = 81055128. Its totient is φ = 81055126.

The previous prime is 81055109. The next prime is 81055141. The reversal of 81055127 is 72155018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81055127 - 2¹⁶ = 80989591 is a prime.

It is a super-2 number, since 2×81055127² = 13139867225972258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81055127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81055627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40527563 + 40527564.

It is an arithmetic number, because the mean of its divisors is an integer number (40527564).

Almost surely, 2^81055127 is an apocalyptic number.

81055127 is a deficient number, since it is larger than the sum of its proper divisors (1).

81055127 is an equidigital number, since it uses as much as digits as its factorization.

81055127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 81055127 is about 9003.0620902002. The cubic root of 81055127 is about 432.7730054897.

The spelling of 81055127 in words is "eighty-one million, fifty-five thousand, one hundred twenty-seven".