52551515 has 4 divisors (see below), whose sum is σ = 63061824. Its totient is φ = 42041208.

The previous prime is 52551503. The next prime is 52551529. The reversal of 52551515 is 51515525.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52551515 is a prime.

It is a Duffinian 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, 5255147 + ... + 5255156.

It is an arithmetic number, because the mean of its divisors is an integer number (15765456).

Almost surely, 2^52551515 is an apocalyptic number.

52551515 is a deficient number, since it is larger than the sum of its proper divisors (10510309).

52551515 is a wasteful number, since it uses less digits than its factorization.

52551515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510308.

The product of its digits is 6250, while the sum is 29.

The square root of 52551515 is about 7249.2423742071. The cubic root of 52551515 is about 374.5660521057.

The spelling of 52551515 in words is "fifty-two million, five hundred fifty-one thousand, five hundred fifteen".