52021505 has 8 divisors (see below), whose sum is σ = 64578600. Its totient is φ = 40182016.

The previous prime is 52021493. The next prime is 52021511. The reversal of 52021505 is 50512025.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 51940849 = 284^2 + 7207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52021505 - 2¹⁰ = 52020481 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179240 + ... + 179529.

It is an arithmetic number, because the mean of its divisors is an integer number (8072325).

Almost surely, 2^52021505 is an apocalyptic number.

It is an amenable number.

52021505 is a deficient number, since it is larger than the sum of its proper divisors (12557095).

52021505 is a wasteful number, since it uses less digits than its factorization.

52021505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358803.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 52021505 is about 7212.5935002605. The cubic root of 52021505 is about 373.3025622137.

The spelling of 52021505 in words is "fifty-two million, twenty-one thousand, five hundred five".