501251263 has 4 divisors (see below), whose sum is σ = 510708888. Its totient is φ = 491793640.

The previous prime is 501251227. The next prime is 501251297. The reversal of 501251263 is 362152105.

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-501251263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501201263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728733 + ... + 4728838.

It is an arithmetic number, because the mean of its divisors is an integer number (127677222).

Almost surely, 2^501251263 is an apocalyptic number.

501251263 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

501251263 is a deficient number, since it is larger than the sum of its proper divisors (9457625).

501251263 is an equidigital number, since it uses as much as digits as its factorization.

501251263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457624.

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

The square root of 501251263 is about 22388.6413835230. The cubic root of 501251263 is about 794.3620598562.

The spelling of 501251263 in words is "five hundred one million, two hundred fifty-one thousand, two hundred sixty-three".