3445725281 has 2 divisors, whose sum is σ = 3445725282. Its totient is φ = 3445725280.

The previous prime is 3445725209. The next prime is 3445725287. The reversal of 3445725281 is 1825275443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2092147600 + 1353577681 = 45740^2 + 36791^2 .

It is a cyclic number.

It is not a de Polignac number, because 3445725281 - 2²² = 3441530977 is a prime.

It is a super-2 number, since 2×3445725281² = 23746045424245057922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3445725287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722862640 + 1722862641.

It is an arithmetic number, because the mean of its divisors is an integer number (1722862641).

Almost surely, 2^3445725281 is an apocalyptic number.

It is an amenable number.

3445725281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3445725281 is an equidigital number, since it uses as much as digits as its factorization.

3445725281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 41.

The square root of 3445725281 is about 58700.3005188219. The cubic root of 3445725281 is about 1510.4054699611.

The spelling of 3445725281 in words is "three billion, four hundred forty-five million, seven hundred twenty-five thousand, two hundred eighty-one".