503211215261 has 2 divisors, whose sum is σ = 503211215262. Its totient is φ = 503211215260.

The previous prime is 503211215209. The next prime is 503211215279. The reversal of 503211215261 is 162512112305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480408403225 + 22802812036 = 693115^2 + 151006^2 .

It is a cyclic number.

It is not a de Polignac number, because 503211215261 - 2¹⁴ = 503211198877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503211215161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251605607630 + 251605607631.

It is an arithmetic number, because the mean of its divisors is an integer number (251605607631).

Almost surely, 2^503211215261 is an apocalyptic number.

It is an amenable number.

503211215261 is a deficient number, since it is larger than the sum of its proper divisors (1).

503211215261 is an equidigital number, since it uses as much as digits as its factorization.

503211215261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 503211215261 its reverse (162512112305), we get a palindrome (665723327566).

The spelling of 503211215261 in words is "five hundred three billion, two hundred eleven million, two hundred fifteen thousand, two hundred sixty-one".