53117555 has 4 divisors (see below), whose sum is σ = 63741072. Its totient is φ = 42494040.

The previous prime is 53117551. The next prime is 53117569. The reversal of 53117555 is 55571135.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53117555 - 2² = 53117551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53117551) 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, 5311751 + ... + 5311760.

It is an arithmetic number, because the mean of its divisors is an integer number (15935268).

Almost surely, 2^53117555 is an apocalyptic number.

53117555 is a deficient number, since it is larger than the sum of its proper divisors (10623517).

53117555 is a wasteful number, since it uses less digits than its factorization.

53117555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10623516.

The product of its digits is 13125, while the sum is 32.

The square root of 53117555 is about 7288.1791278755. The cubic root of 53117555 is about 375.9060874367.

The spelling of 53117555 in words is "fifty-three million, one hundred seventeen thousand, five hundred fifty-five".