2256500009 has 2 divisors, whose sum is σ = 2256500010. Its totient is φ = 2256500008.

The previous prime is 2256500003. The next prime is 2256500023. The reversal of 2256500009 is 9000056522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1480710400 + 775789609 = 38480^2 + 27853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256500009 - 2¹⁶ = 2256434473 is a prime.

It is a super-4 number, since 4×2256500009⁴ (a number of 39 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (2256500003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128250004 + 1128250005.

It is an arithmetic number, because the mean of its divisors is an integer number (1128250005).

Almost surely, 2^2256500009 is an apocalyptic number.

It is an amenable number.

2256500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256500009 is an equidigital number, since it uses as much as digits as its factorization.

2256500009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2256500009 is about 47502.6316007861. The cubic root of 2256500009 is about 1311.6313241400.

The spelling of 2256500009 in words is "two billion, two hundred fifty-six million, five hundred thousand, nine".