55399523 has 4 divisors (see below), whose sum is σ = 56687928. Its totient is φ = 54111120.

The previous prime is 55399517. The next prime is 55399601. The reversal of 55399523 is 32599355.

55399523 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 an emirpimes, since its reverse is a distinct semiprime: 32599355 = 5 ⋅6519871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55399523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (55399823) 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, 644138 + ... + 644223.

It is an arithmetic number, because the mean of its divisors is an integer number (14171982).

Almost surely, 2^55399523 is an apocalyptic number.

55399523 is a deficient number, since it is larger than the sum of its proper divisors (1288405).

55399523 is a wasteful number, since it uses less digits than its factorization.

55399523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288404.

The product of its digits is 182250, while the sum is 41.

The square root of 55399523 is about 7443.0855832779. The cubic root of 55399523 is about 381.2138538516.

The spelling of 55399523 in words is "fifty-five million, three hundred ninety-nine thousand, five hundred twenty-three".