503261113261 has 4 divisors (see below), whose sum is σ = 503282957472. Its totient is φ = 503239269052.

The previous prime is 503261113211. The next prime is 503261113273. The reversal of 503261113261 is 162311162305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 503261113261 - 2¹³ = 503261105069 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 (503261113211) 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, 10887511 + ... + 10933636.

It is an arithmetic number, because the mean of its divisors is an integer number (125820739368).

Almost surely, 2^503261113261 is an apocalyptic number.

It is an amenable number.

503261113261 is a deficient number, since it is larger than the sum of its proper divisors (21844211).

503261113261 is a wasteful number, since it uses less digits than its factorization.

503261113261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21844210.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 503261113261 its reverse (162311162305), we get a palindrome (665572275566).

The spelling of 503261113261 in words is "five hundred three billion, two hundred sixty-one million, one hundred thirteen thousand, two hundred sixty-one".