55109161 has 2 divisors, whose sum is σ = 55109162. Its totient is φ = 55109160.

The previous prime is 55109149. The next prime is 55109167. The reversal of 55109161 is 16190155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55041561 + 67600 = 7419^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 55109161 - 2⁵ = 55109129 is a prime.

It is a super-2 number, since 2×55109161² = 6074039252247842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55109167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27554580 + 27554581.

It is an arithmetic number, because the mean of its divisors is an integer number (27554581).

Almost surely, 2^55109161 is an apocalyptic number.

It is an amenable number.

55109161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55109161 is an equidigital number, since it uses as much as digits as its factorization.

55109161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 55109161 is about 7423.5544720841. The cubic root of 55109161 is about 380.5466762282.

The spelling of 55109161 in words is "fifty-five million, one hundred nine thousand, one hundred sixty-one".