55161607 has 4 divisors (see below), whose sum is σ = 55176696. Its totient is φ = 55146520.

The previous prime is 55161581. The next prime is 55161619. The reversal of 55161607 is 70616155.

55161607 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70616155 = 5 ⋅14123231.

It is a cyclic number.

It is not a de Polignac number, because 55161607 - 2¹⁵ = 55128839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55161677) 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, 1788 + ... + 10654.

It is an arithmetic number, because the mean of its divisors is an integer number (13794174).

Almost surely, 2^55161607 is an apocalyptic number.

55161607 is a deficient number, since it is larger than the sum of its proper divisors (15089).

55161607 is an equidigital number, since it uses as much as digits as its factorization.

55161607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15088.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 55161607 is about 7427.0860369327. The cubic root of 55161607 is about 380.6673568479.

The spelling of 55161607 in words is "fifty-five million, one hundred sixty-one thousand, six hundred seven".