3378243521 has 2 divisors, whose sum is σ = 3378243522. Its totient is φ = 3378243520.

The previous prime is 3378243511. The next prime is 3378243527. The reversal of 3378243521 is 1253428733.

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., 3365740225 + 12503296 = 58015^2 + 3536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3378243521 is a prime.

It is a super-2 number, since 2×3378243521² = 22825058574356954882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3378243527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1689121760 + 1689121761.

It is an arithmetic number, because the mean of its divisors is an integer number (1689121761).

Almost surely, 2^3378243521 is an apocalyptic number.

It is an amenable number.

3378243521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3378243521 is an equidigital number, since it uses as much as digits as its factorization.

3378243521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 3378243521 is about 58122.6592732989. The cubic root of 3378243521 is about 1500.4803677777.

The spelling of 3378243521 in words is "three billion, three hundred seventy-eight million, two hundred forty-three thousand, five hundred twenty-one".