318225580381 has 2 divisors, whose sum is σ = 318225580382. Its totient is φ = 318225580380.

The previous prime is 318225580369. The next prime is 318225580403. The reversal of 318225580381 is 183085522813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197162640900 + 121062939481 = 444030^2 + 347941^2 .

It is a cyclic number.

It is not a de Polignac number, because 318225580381 - 2²⁷ = 318091362653 is a prime.

It is a super-2 number, since 2×318225580381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318225583381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159112790190 + 159112790191.

It is an arithmetic number, because the mean of its divisors is an integer number (159112790191).

Almost surely, 2^318225580381 is an apocalyptic number.

It is an amenable number.

318225580381 is a deficient number, since it is larger than the sum of its proper divisors (1).

318225580381 is an equidigital number, since it uses as much as digits as its factorization.

318225580381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 318225580381 in words is "three hundred eighteen billion, two hundred twenty-five million, five hundred eighty thousand, three hundred eighty-one".