53115647 has 4 divisors (see below), whose sum is σ = 57201480. Its totient is φ = 49029816.

The previous prime is 53115631. The next prime is 53115649. The reversal of 53115647 is 74651135.

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

It is a cyclic number.

It is not a de Polignac number, because 53115647 - 2⁴ = 53115631 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 (53115649) 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, 2042897 + ... + 2042922.

It is an arithmetic number, because the mean of its divisors is an integer number (14300370).

Almost surely, 2^53115647 is an apocalyptic number.

53115647 is a deficient number, since it is larger than the sum of its proper divisors (4085833).

53115647 is a wasteful number, since it uses less digits than its factorization.

53115647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085832.

The product of its digits is 12600, while the sum is 32.

The square root of 53115647 is about 7288.0482298075. The cubic root of 53115647 is about 375.9015864928.

The spelling of 53115647 in words is "fifty-three million, one hundred fifteen thousand, six hundred forty-seven".