1097155181 has 2 divisors, whose sum is σ = 1097155182. Its totient is φ = 1097155180.

The previous prime is 1097155141. The next prime is 1097155183. The reversal of 1097155181 is 1815517901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032593956 + 64561225 = 32134^2 + 8035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097155181 - 2¹⁴ = 1097138797 is a prime.

It is a super-2 number, since 2×1097155181² = 2407498982390285522, which contains 22 as substring.

Together with 1097155183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097155183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548577590 + 548577591.

It is an arithmetic number, because the mean of its divisors is an integer number (548577591).

Almost surely, 2^1097155181 is an apocalyptic number.

It is an amenable number.

1097155181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097155181 is an equidigital number, since it uses as much as digits as its factorization.

1097155181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 38.

The square root of 1097155181 is about 33123.3328788031. The cubic root of 1097155181 is about 1031.3894532392.

The spelling of 1097155181 in words is "one billion, ninety-seven million, one hundred fifty-five thousand, one hundred eighty-one".