55130618 has 4 divisors (see below), whose sum is σ = 82695930. Its totient is φ = 27565308.

The previous prime is 55130611. The next prime is 55130627. The reversal of 55130618 is 81603155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81603155 = 5 ⋅16320631.

It can be written as a sum of positive squares in only one way, i.e., 28121809 + 27008809 = 5303^2 + 5197^2 .

It is not an unprimeable number, because it can be changed into a prime (55130611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13782653 + ... + 13782656.

Almost surely, 2^55130618 is an apocalyptic number.

55130618 is a deficient number, since it is larger than the sum of its proper divisors (27565312).

55130618 is a wasteful number, since it uses less digits than its factorization.

55130618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27565311.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 55130618 is about 7424.9995286195. Note that the first 3 decimals coincide. The cubic root of 55130618 is about 380.5960590069.

The spelling of 55130618 in words is "fifty-five million, one hundred thirty thousand, six hundred eighteen".