325278879221 has 2 divisors, whose sum is σ = 325278879222. Its totient is φ = 325278879220.

The previous prime is 325278879197. The next prime is 325278879259. The reversal of 325278879221 is 122978872523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261234454321 + 64044424900 = 511111^2 + 253070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-325278879221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325278879271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162639439610 + 162639439611.

It is an arithmetic number, because the mean of its divisors is an integer number (162639439611).

Almost surely, 2^325278879221 is an apocalyptic number.

It is an amenable number.

325278879221 is a deficient number, since it is larger than the sum of its proper divisors (1).

325278879221 is an equidigital number, since it uses as much as digits as its factorization.

325278879221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 56.

The spelling of 325278879221 in words is "three hundred twenty-five billion, two hundred seventy-eight million, eight hundred seventy-nine thousand, two hundred twenty-one".