55170013 has 2 divisors, whose sum is σ = 55170014. Its totient is φ = 55170012.

The previous prime is 55169999. The next prime is 55170019. The reversal of 55170013 is 31007155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53772889 + 1397124 = 7333^2 + 1182^2 .

It is a cyclic number.

It is not a de Polignac number, because 55170013 - 2⁹ = 55169501 is a prime.

It is a super-5 number, since 5×55170013⁵ (a number of 40 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55170019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27585006 + 27585007.

It is an arithmetic number, because the mean of its divisors is an integer number (27585007).

Almost surely, 2^55170013 is an apocalyptic number.

It is an amenable number.

55170013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55170013 is an equidigital number, since it uses as much as digits as its factorization.

55170013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 55170013 is about 7427.6519169923. The cubic root of 55170013 is about 380.6866923208.

Adding to 55170013 its reverse (31007155), we get a palindrome (86177168).

The spelling of 55170013 in words is "fifty-five million, one hundred seventy thousand, thirteen".