311404229 has 2 divisors, whose sum is σ = 311404230. Its totient is φ = 311404228.

The previous prime is 311404217. The next prime is 311404259. The reversal of 311404229 is 922404113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249703204 + 61701025 = 15802^2 + 7855^2 .

It is a cyclic number.

It is not a de Polignac number, because 311404229 - 2²⁸ = 42968773 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 311404198 and 311404207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311404259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155702114 + 155702115.

It is an arithmetic number, because the mean of its divisors is an integer number (155702115).

Almost surely, 2^311404229 is an apocalyptic number.

It is an amenable number.

311404229 is a deficient number, since it is larger than the sum of its proper divisors (1).

311404229 is an equidigital number, since it uses as much as digits as its factorization.

311404229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 311404229 is about 17646.6492286779. The cubic root of 311404229 is about 677.8103072377.

The spelling of 311404229 in words is "three hundred eleven million, four hundred four thousand, two hundred twenty-nine".