340046221 has 2 divisors, whose sum is σ = 340046222. Its totient is φ = 340046220.

The previous prime is 340046137. The next prime is 340046293. The reversal of 340046221 is 122640043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308529225 + 31516996 = 17565^2 + 5614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340046221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340046192 and 340046201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340046621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170023110 + 170023111.

It is an arithmetic number, because the mean of its divisors is an integer number (170023111).

Almost surely, 2^340046221 is an apocalyptic number.

It is an amenable number.

340046221 is a deficient number, since it is larger than the sum of its proper divisors (1).

340046221 is an equidigital number, since it uses as much as digits as its factorization.

340046221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 340046221 is about 18440.3422148289. The cubic root of 340046221 is about 697.9848308020.

Adding to 340046221 its reverse (122640043), we get a palindrome (462686264).

The spelling of 340046221 in words is "three hundred forty million, forty-six thousand, two hundred twenty-one".