55569161 has 2 divisors, whose sum is σ = 55569162. Its totient is φ = 55569160.

The previous prime is 55569131. The next prime is 55569179. The reversal of 55569161 is 16196555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 156025 = 7444^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 55569161 - 2⁶ = 55569097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55569121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27784580 + 27784581.

It is an arithmetic number, because the mean of its divisors is an integer number (27784581).

Almost surely, 2^55569161 is an apocalyptic number.

It is an amenable number.

55569161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55569161 is an equidigital number, since it uses as much as digits as its factorization.

55569161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40500, while the sum is 38.

The square root of 55569161 is about 7454.4725500870. The cubic root of 55569161 is about 381.6025603341.

The spelling of 55569161 in words is "fifty-five million, five hundred sixty-nine thousand, one hundred sixty-one".