55138351 has 4 divisors (see below), whose sum is σ = 55203400. Its totient is φ = 55073304.

The previous prime is 55138319. The next prime is 55138403. The reversal of 55138351 is 15383155.

55138351 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: 15383155 = 5 ⋅3076631.

It is a cyclic number.

It is not a de Polignac number, because 55138351 - 2⁵ = 55138319 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 (55138301) 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, 31236 + ... + 32953.

It is an arithmetic number, because the mean of its divisors is an integer number (13800850).

Almost surely, 2^55138351 is an apocalyptic number.

55138351 is a deficient number, since it is larger than the sum of its proper divisors (65049).

55138351 is an equidigital number, since it uses as much as digits as its factorization.

55138351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65048.

The product of its digits is 9000, while the sum is 31.

The square root of 55138351 is about 7425.5202511339. The cubic root of 55138351 is about 380.6138531827.

The spelling of 55138351 in words is "fifty-five million, one hundred thirty-eight thousand, three hundred fifty-one".