503257721542423 has 4 divisors (see below), whose sum is σ = 503258447708080. Its totient is φ = 503256995376768.

The previous prime is 503257721542397. The next prime is 503257721542531. The reversal of 503257721542423 is 324245127752305.

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 503257721542423 - 2²⁵ = 503257687987991 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 (503257721552423) 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, 362042283 + ... + 363429676.

It is an arithmetic number, because the mean of its divisors is an integer number (125814611927020).

Almost surely, 2^{503257721542423} is an apocalyptic number.

503257721542423 is a deficient number, since it is larger than the sum of its proper divisors (726165657).

503257721542423 is an equidigital number, since it uses as much as digits as its factorization.

503257721542423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726165656.

The product of its (nonzero) digits is 14112000, while the sum is 52.

The spelling of 503257721542423 in words is "five hundred three trillion, two hundred fifty-seven billion, seven hundred twenty-one million, five hundred forty-two thousand, four hundred twenty-three".