5181623 has 4 divisors (see below), whose sum is σ = 5454360. Its totient is φ = 4908888.

The previous prime is 5181611. The next prime is 5181637. The reversal of 5181623 is 3261815.

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 5181623 - 2⁶ = 5181559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5181592 and 5181601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136340 + ... + 136377.

It is an arithmetic number, because the mean of its divisors is an integer number (1363590).

Almost surely, 2^5181623 is an apocalyptic number.

5181623 is a deficient number, since it is larger than the sum of its proper divisors (272737).

5181623 is a wasteful number, since it uses less digits than its factorization.

5181623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272736.

The product of its digits is 1440, while the sum is 26.

The square root of 5181623 is about 2276.3178600538. The cubic root of 5181623 is about 173.0434920222.

The spelling of 5181623 in words is "five million, one hundred eighty-one thousand, six hundred twenty-three".