255210370697 has 2 divisors, whose sum is σ = 255210370698. Its totient is φ = 255210370696.

The previous prime is 255210370691. The next prime is 255210370721. The reversal of 255210370697 is 796073012552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189241530361 + 65968840336 = 435019^2 + 256844^2 .

It is a cyclic number.

It is not a de Polignac number, because 255210370697 - 2²⁴ = 255193593481 is a prime.

It is a super-2 number, since 2×255210370697² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255210370691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127605185348 + 127605185349.

It is an arithmetic number, because the mean of its divisors is an integer number (127605185349).

Almost surely, 2^255210370697 is an apocalyptic number.

It is an amenable number.

255210370697 is a deficient number, since it is larger than the sum of its proper divisors (1).

255210370697 is an equidigital number, since it uses as much as digits as its factorization.

255210370697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 255210370697 in words is "two hundred fifty-five billion, two hundred ten million, three hundred seventy thousand, six hundred ninety-seven".