52509986 has 4 divisors (see below), whose sum is σ = 78764982. Its totient is φ = 26254992.

The previous prime is 52509979. The next prime is 52509997. The reversal of 52509986 is 68990525.

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

It can be written as a sum of positive squares in only one way, i.e., 45981961 + 6528025 = 6781^2 + 2555^2 .

It is a super-3 number, since 3×52509986³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13127495 + ... + 13127498.

Almost surely, 2^52509986 is an apocalyptic number.

52509986 is a deficient number, since it is larger than the sum of its proper divisors (26254996).

52509986 is a wasteful number, since it uses less digits than its factorization.

52509986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26254995.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 52509986 is about 7246.3774397971. The cubic root of 52509986 is about 374.4673587700.

The spelling of 52509986 in words is "fifty-two million, five hundred nine thousand, nine hundred eighty-six".