53155477 has 4 divisors (see below), whose sum is σ = 53561376. Its totient is φ = 52749580.

The previous prime is 53155471. The next prime is 53155523. The reversal of 53155477 is 77455135.

53155477 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77455135 = 5 ⋅15491027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53155477 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 (53155471) 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, 202753 + ... + 203014.

It is an arithmetic number, because the mean of its divisors is an integer number (13390344).

Almost surely, 2^53155477 is an apocalyptic number.

It is an amenable number.

53155477 is a deficient number, since it is larger than the sum of its proper divisors (405899).

53155477 is a wasteful number, since it uses less digits than its factorization.

53155477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405898.

The product of its digits is 73500, while the sum is 37.

The square root of 53155477 is about 7290.7802737430. The cubic root of 53155477 is about 375.9955225248.

The spelling of 53155477 in words is "fifty-three million, one hundred fifty-five thousand, four hundred seventy-seven".