503445523213 has 4 divisors (see below), whose sum is σ = 503973798588. Its totient is φ = 502917247840.

The previous prime is 503445523187. The next prime is 503445523271. The reversal of 503445523213 is 312325544305.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312325544305 = 5 ⋅62465108861.

It can be written as a sum of positive squares in 2 ways, for example, as 376654693284 + 126790829929 = 613722^2 + 356077^2 .

It is a cyclic number.

It is not a de Polignac number, because 503445523213 - 2¹³ = 503445515021 is a prime.

It is a super-3 number, since 3×503445523213³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503445553213) 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, 264136258 + ... + 264138163.

It is an arithmetic number, because the mean of its divisors is an integer number (125993449647).

Almost surely, 2^503445523213 is an apocalyptic number.

It is an amenable number.

503445523213 is a deficient number, since it is larger than the sum of its proper divisors (528275375).

503445523213 is an equidigital number, since it uses as much as digits as its factorization.

503445523213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528275374.

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 503445523213 in words is "five hundred three billion, four hundred forty-five million, five hundred twenty-three thousand, two hundred thirteen".