53191555 has 16 divisors (see below), whose sum is σ = 69237504. Its totient is φ = 39070720.

The previous prime is 53191553. The next prime is 53191561. The reversal of 53191555 is 55519135.

It is a happy number.

53191555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53191555 - 2¹ = 53191553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53191555.

It is not an unprimeable number, because it can be changed into a prime (53191553) 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 15 ways as a sum of consecutive naturals, for example, 4147 + ... + 11116.

It is an arithmetic number, because the mean of its divisors is an integer number (4327344).

Almost surely, 2^53191555 is an apocalyptic number.

53191555 is a deficient number, since it is larger than the sum of its proper divisors (16045949).

53191555 is a wasteful number, since it uses less digits than its factorization.

53191555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15326.

The product of its digits is 16875, while the sum is 34.

The square root of 53191555 is about 7293.2540748283. The cubic root of 53191555 is about 376.0805692554.

The spelling of 53191555 in words is "fifty-three million, one hundred ninety-one thousand, five hundred fifty-five".