52361521 has 4 divisors (see below), whose sum is σ = 52493812. Its totient is φ = 52229232.

The previous prime is 52361489. The next prime is 52361527. The reversal of 52361521 is 12516325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27720225 + 24641296 = 5265^2 + 4964^2 .

It is a cyclic number.

It is not a de Polignac number, because 52361521 - 2⁵ = 52361489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52361527) 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, 65550 + ... + 66343.

It is an arithmetic number, because the mean of its divisors is an integer number (13123453).

Almost surely, 2^52361521 is an apocalyptic number.

It is an amenable number.

52361521 is a deficient number, since it is larger than the sum of its proper divisors (132291).

52361521 is a wasteful number, since it uses less digits than its factorization.

52361521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132290.

The product of its digits is 1800, while the sum is 25.

The square root of 52361521 is about 7236.1261044844. The cubic root of 52361521 is about 374.1141067557.

Adding to 52361521 its reverse (12516325), we get a palindrome (64877846).

The spelling of 52361521 in words is "fifty-two million, three hundred sixty-one thousand, five hundred twenty-one".