343521481 has 2 divisors, whose sum is σ = 343521482. Its totient is φ = 343521480.

The previous prime is 343521473. The next prime is 343521487. The reversal of 343521481 is 184125343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341658256 + 1863225 = 18484^2 + 1365^2 .

It is an emirp because it is prime and its reverse (184125343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343521481 - 2³ = 343521473 is a prime.

It is a super-2 number, since 2×343521481² = 236014015816866722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343521487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171760740 + 171760741.

It is an arithmetic number, because the mean of its divisors is an integer number (171760741).

Almost surely, 2^343521481 is an apocalyptic number.

It is an amenable number.

343521481 is a deficient number, since it is larger than the sum of its proper divisors (1).

343521481 is an equidigital number, since it uses as much as digits as its factorization.

343521481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 343521481 is about 18534.3324940501. The cubic root of 343521481 is about 700.3545693501.

The spelling of 343521481 in words is "three hundred forty-three million, five hundred twenty-one thousand, four hundred eighty-one".