2251220626009 has 2 divisors, whose sum is σ = 2251220626010. Its totient is φ = 2251220626008.

The previous prime is 2251220625971. The next prime is 2251220626037. The reversal of 2251220626009 is 9006260221522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1744948531225 + 506272094784 = 1320965^2 + 711528^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251220626009 - 2⁹ = 2251220625497 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251220626409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125610313004 + 1125610313005.

It is an arithmetic number, because the mean of its divisors is an integer number (1125610313005).

Almost surely, 2^{2251220626009} is an apocalyptic number.

It is an amenable number.

2251220626009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251220626009 is an equidigital number, since it uses as much as digits as its factorization.

2251220626009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 2251220626009 in words is "two trillion, two hundred fifty-one billion, two hundred twenty million, six hundred twenty-six thousand, nine".