815223635856053 has 2 divisors, whose sum is σ = 815223635856054. Its totient is φ = 815223635856052.

The previous prime is 815223635855983. The next prime is 815223635856067. The reversal of 815223635856053 is 350658536322518.

815223635856053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577847463017764 + 237376172838289 = 24038458^2 + 15407017^2 .

It is a cyclic number.

It is not a de Polignac number, because 815223635856053 - 2¹⁰ = 815223635855029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815223635856073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407611817928026 + 407611817928027.

It is an arithmetic number, because the mean of its divisors is an integer number (407611817928027).

Almost surely, 2^{815223635856053} is an apocalyptic number.

It is an amenable number.

815223635856053 is a deficient number, since it is larger than the sum of its proper divisors (1).

815223635856053 is an equidigital number, since it uses as much as digits as its factorization.

815223635856053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520000, while the sum is 62.

The spelling of 815223635856053 in words is "eight hundred fifteen trillion, two hundred twenty-three billion, six hundred thirty-five million, eight hundred fifty-six thousand, fifty-three".