55371161 has 2 divisors, whose sum is σ = 55371162. Its totient is φ = 55371160.

The previous prime is 55371139. The next prime is 55371163. The reversal of 55371161 is 16117355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 11560000 = 6619^2 + 3400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55371161 is a prime.

Together with 55371163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55371163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27685580 + 27685581.

It is an arithmetic number, because the mean of its divisors is an integer number (27685581).

Almost surely, 2^55371161 is an apocalyptic number.

It is an amenable number.

55371161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55371161 is an equidigital number, since it uses as much as digits as its factorization.

55371161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 55371161 is about 7441.1800811430. The cubic root of 55371161 is about 381.1487881113.

The spelling of 55371161 in words is "fifty-five million, three hundred seventy-one thousand, one hundred sixty-one".