55166123 has 4 divisors (see below), whose sum is σ = 55212240. Its totient is φ = 55120008.

The previous prime is 55166087. The next prime is 55166141. The reversal of 55166123 is 32166155.

55166123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55166123 - 2²² = 50971819 is a prime.

It is a super-2 number, since 2×55166123² = 6086602253702258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55166623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21215 + ... + 23672.

It is an arithmetic number, because the mean of its divisors is an integer number (13803060).

Almost surely, 2^55166123 is an apocalyptic number.

55166123 is a deficient number, since it is larger than the sum of its proper divisors (46117).

55166123 is a wasteful number, since it uses less digits than its factorization.

55166123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46116.

The product of its digits is 5400, while the sum is 29.

The square root of 55166123 is about 7427.3900530402. The cubic root of 55166123 is about 380.6777447908.

It can be divided in two parts, 551661 and 23, that multiplied together give a triangular number (12688203 = T₅₀₃₇).

The spelling of 55166123 in words is "fifty-five million, one hundred sixty-six thousand, one hundred twenty-three".