52521251 has 4 divisors (see below), whose sum is σ = 53512272. Its totient is φ = 51530232.

The previous prime is 52521221. The next prime is 52521257. The reversal of 52521251 is 15212525.

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

It is a cyclic number.

It is not a de Polignac number, because 52521251 - 2¹⁸ = 52259107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52521257) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 495431 + ... + 495536.

It is an arithmetic number, because the mean of its divisors is an integer number (13378068).

Almost surely, 2^52521251 is an apocalyptic number.

52521251 is a deficient number, since it is larger than the sum of its proper divisors (991021).

52521251 is an equidigital number, since it uses as much as digits as its factorization.

52521251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991020.

The product of its digits is 1000, while the sum is 23.

The square root of 52521251 is about 7247.1546830463. The cubic root of 52521251 is about 374.4941350939.

Adding to 52521251 its reverse (15212525), we get a palindrome (67733776).

The spelling of 52521251 in words is "fifty-two million, five hundred twenty-one thousand, two hundred fifty-one".