52311521 has 4 divisors (see below), whose sum is σ = 53528112. Its totient is φ = 51094932.

The previous prime is 52311481. The next prime is 52311527. The reversal of 52311521 is 12511325.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52311521 - 2¹⁴ = 52295137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52311493 and 52311502.

It is not an unprimeable number, because it can be changed into a prime (52311527) 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, 608231 + ... + 608316.

It is an arithmetic number, because the mean of its divisors is an integer number (13382028).

Almost surely, 2^52311521 is an apocalyptic number.

It is an amenable number.

52311521 is a deficient number, since it is larger than the sum of its proper divisors (1216591).

52311521 is a wasteful number, since it uses less digits than its factorization.

52311521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216590.

The product of its digits is 300, while the sum is 20.

The square root of 52311521 is about 7232.6703920475. The cubic root of 52311521 is about 373.9949883512.

Adding to 52311521 its reverse (12511325), we get a palindrome (64822846).

The spelling of 52311521 in words is "fifty-two million, three hundred eleven thousand, five hundred twenty-one".