53015015 has 4 divisors (see below), whose sum is σ = 63618024. Its totient is φ = 42412008.

The previous prime is 53015003. The next prime is 53015029. The reversal of 53015015 is 51051035.

It is a happy number.

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 53015015 - 2²² = 48820711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5301497 + ... + 5301506.

It is an arithmetic number, because the mean of its divisors is an integer number (15904506).

Almost surely, 2^53015015 is an apocalyptic number.

53015015 is a deficient number, since it is larger than the sum of its proper divisors (10603009).

53015015 is a wasteful number, since it uses less digits than its factorization.

53015015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603008.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 53015015 is about 7281.1410506870. The cubic root of 53015015 is about 375.6640441676.

The spelling of 53015015 in words is "fifty-three million, fifteen thousand, fifteen".