1650225281 has 2 divisors, whose sum is σ = 1650225282. Its totient is φ = 1650225280.

The previous prime is 1650225223. The next prime is 1650225301. The reversal of 1650225281 is 1825220561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 853574656 + 796650625 = 29216^2 + 28225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650225281 - 2⁶ = 1650225217 is a prime.

It is a super-2 number, since 2×1650225281² = 5446486956103057922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1650221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825112640 + 825112641.

It is an arithmetic number, because the mean of its divisors is an integer number (825112641).

Almost surely, 2^1650225281 is an apocalyptic number.

It is an amenable number.

1650225281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650225281 is an equidigital number, since it uses as much as digits as its factorization.

1650225281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1650225281 is about 40622.9649459514. The cubic root of 1650225281 is about 1181.7195271801.

The spelling of 1650225281 in words is "one billion, six hundred fifty million, two hundred twenty-five thousand, two hundred eighty-one".