3251205649 has 2 divisors, whose sum is σ = 3251205650. Its totient is φ = 3251205648.

The previous prime is 3251205623. The next prime is 3251205667. The reversal of 3251205649 is 9465021523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3242163600 + 9042049 = 56940^2 + 3007^2 .

It is a cyclic number.

It is not a de Polignac number, because 3251205649 - 2⁷ = 3251205521 is a prime.

It is a super-2 number, since 2×3251205649² = 21140676344179022402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3251205149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1625602824 + 1625602825.

It is an arithmetic number, because the mean of its divisors is an integer number (1625602825).

Almost surely, 2^3251205649 is an apocalyptic number.

It is an amenable number.

3251205649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3251205649 is an equidigital number, since it uses as much as digits as its factorization.

3251205649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 3251205649 is about 57019.3445156992. The cubic root of 3251205649 is about 1481.4311772214.

The spelling of 3251205649 in words is "three billion, two hundred fifty-one million, two hundred five thousand, six hundred forty-nine".