321319253 has 2 divisors, whose sum is σ = 321319254. Its totient is φ = 321319252.

The previous prime is 321319249. The next prime is 321319259. The reversal of 321319253 is 352913123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261210244 + 60109009 = 16162^2 + 7753^2 .

It is a cyclic number.

It is not a de Polignac number, because 321319253 - 2² = 321319249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321319259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160659626 + 160659627.

It is an arithmetic number, because the mean of its divisors is an integer number (160659627).

Almost surely, 2^321319253 is an apocalyptic number.

It is an amenable number.

321319253 is a deficient number, since it is larger than the sum of its proper divisors (1).

321319253 is an equidigital number, since it uses as much as digits as its factorization.

321319253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 321319253 is about 17925.3801354392. The cubic root of 321319253 is about 684.9290444556.

The spelling of 321319253 in words is "three hundred twenty-one million, three hundred nineteen thousand, two hundred fifty-three".