504240251 has 4 divisors (see below), whose sum is σ = 513754272. Its totient is φ = 494726232.

The previous prime is 504240223. The next prime is 504240277. The reversal of 504240251 is 152042405.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504240251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504242251) 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, 4756931 + ... + 4757036.

It is an arithmetic number, because the mean of its divisors is an integer number (128438568).

Almost surely, 2^504240251 is an apocalyptic number.

504240251 is a deficient number, since it is larger than the sum of its proper divisors (9514021).

504240251 is an equidigital number, since it uses as much as digits as its factorization.

504240251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514020.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 504240251 is about 22455.2944981802. The cubic root of 504240251 is about 795.9378728773.

Adding to 504240251 its reverse (152042405), we get a palindrome (656282656).

The spelling of 504240251 in words is "five hundred four million, two hundred forty thousand, two hundred fifty-one".