55570181 has 2 divisors, whose sum is σ = 55570182. Its totient is φ = 55570180.

The previous prime is 55570171. The next prime is 55570187. The reversal of 55570181 is 18107555.

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., 53217025 + 2353156 = 7295^2 + 1534^2 .

It is a cyclic number.

It is not a de Polignac number, because 55570181 - 2¹⁸ = 55308037 is a prime.

It is a super-2 number, since 2×55570181² = 6176090032745522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55570187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785090 + 27785091.

It is an arithmetic number, because the mean of its divisors is an integer number (27785091).

Almost surely, 2^55570181 is an apocalyptic number.

It is an amenable number.

55570181 is a deficient number, since it is larger than the sum of its proper divisors (1).

55570181 is an equidigital number, since it uses as much as digits as its factorization.

55570181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 55570181 is about 7454.5409650763. The cubic root of 55570181 is about 381.6048951557.

The spelling of 55570181 in words is "fifty-five million, five hundred seventy thousand, one hundred eighty-one".