2251501009 has 2 divisors, whose sum is σ = 2251501010. Its totient is φ = 2251501008.

The previous prime is 2251501001. The next prime is 2251501037. The reversal of 2251501009 is 9001051522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1408876225 + 842624784 = 37535^2 + 29028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251501009 - 2³ = 2251501001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251501001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125750504 + 1125750505.

It is an arithmetic number, because the mean of its divisors is an integer number (1125750505).

Almost surely, 2^2251501009 is an apocalyptic number.

It is an amenable number.

2251501009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251501009 is an equidigital number, since it uses as much as digits as its factorization.

2251501009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 2251501009 is about 47449.9842887224. The cubic root of 2251501009 is about 1310.6620216961.

The spelling of 2251501009 in words is "two billion, two hundred fifty-one million, five hundred one thousand, nine".