263213323157 has 2 divisors, whose sum is σ = 263213323158. Its totient is φ = 263213323156.

The previous prime is 263213323111. The next prime is 263213323229. The reversal of 263213323157 is 751323312362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260126520676 + 3086802481 = 510026^2 + 55559^2 .

It is a cyclic number.

It is not a de Polignac number, because 263213323157 - 2²⁸ = 262944887701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263213323157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263213323057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131606661578 + 131606661579.

It is an arithmetic number, because the mean of its divisors is an integer number (131606661579).

Almost surely, 2^263213323157 is an apocalyptic number.

It is an amenable number.

263213323157 is a deficient number, since it is larger than the sum of its proper divisors (1).

263213323157 is an equidigital number, since it uses as much as digits as its factorization.

263213323157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 38.

The spelling of 263213323157 in words is "two hundred sixty-three billion, two hundred thirteen million, three hundred twenty-three thousand, one hundred fifty-seven".