52506251 has 8 divisors (see below), whose sum is σ = 63537120. Its totient is φ = 42357888.

The previous prime is 52506247. The next prime is 52506257. The reversal of 52506251 is 15260525.

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 52506251 - 2² = 52506247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52506251.

It is not an unprimeable number, because it can be changed into a prime (52506257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220496 + ... + 220733.

It is an arithmetic number, because the mean of its divisors is an integer number (7942140).

Almost surely, 2^52506251 is an apocalyptic number.

52506251 is a deficient number, since it is larger than the sum of its proper divisors (11030869).

52506251 is a wasteful number, since it uses less digits than its factorization.

52506251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441253.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 52506251 is about 7246.1197202365. The cubic root of 52506251 is about 374.4584800223.

Adding to 52506251 its reverse (15260525), we get a palindrome (67766776).

The spelling of 52506251 in words is "fifty-two million, five hundred six thousand, two hundred fifty-one".