311223001 has 2 divisors, whose sum is σ = 311223002. Its totient is φ = 311223000.

The previous prime is 311222971. The next prime is 311223007. The reversal of 311223001 is 100322113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268960000 + 42263001 = 16400^2 + 6501^2 .

It is a cyclic number.

It is not a de Polignac number, because 311223001 - 2¹⁷ = 311091929 is a prime.

It is not a weakly prime, because it can be changed into another prime (311223007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611500 + 155611501.

It is an arithmetic number, because the mean of its divisors is an integer number (155611501).

Almost surely, 2^311223001 is an apocalyptic number.

It is an amenable number.

311223001 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223001 is an equidigital number, since it uses as much as digits as its factorization.

311223001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 311223001 is about 17641.5135688523. The cubic root of 311223001 is about 677.6787932418.

Adding to 311223001 its reverse (100322113), we get a palindrome (411545114).

The spelling of 311223001 in words is "three hundred eleven million, two hundred twenty-three thousand, one".