263013053621 has 2 divisors, whose sum is σ = 263013053622. Its totient is φ = 263013053620.

The previous prime is 263013053617. The next prime is 263013053623. The reversal of 263013053621 is 126350310362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143512168900 + 119500884721 = 378830^2 + 345689^2 .

It is a cyclic number.

It is not a de Polignac number, because 263013053621 - 2² = 263013053617 is a prime.

Together with 263013053623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263013053623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131506526810 + 131506526811.

It is an arithmetic number, because the mean of its divisors is an integer number (131506526811).

Almost surely, 2^263013053621 is an apocalyptic number.

It is an amenable number.

263013053621 is a deficient number, since it is larger than the sum of its proper divisors (1).

263013053621 is an equidigital number, since it uses as much as digits as its factorization.

263013053621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 263013053621 its reverse (126350310362), we get a palindrome (389363363983).

The spelling of 263013053621 in words is "two hundred sixty-three billion, thirteen million, fifty-three thousand, six hundred twenty-one".