2551945573 has 2 divisors, whose sum is σ = 2551945574. Its totient is φ = 2551945572.

The previous prime is 2551945523. The next prime is 2551945603. The reversal of 2551945573 is 3755491552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2350504324 + 201441249 = 48482^2 + 14193^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551945573 - 2⁹ = 2551945061 is a prime.

It is a super-3 number, since 3×2551945573³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551945523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275972786 + 1275972787.

It is an arithmetic number, because the mean of its divisors is an integer number (1275972787).

Almost surely, 2^2551945573 is an apocalyptic number.

It is an amenable number.

2551945573 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551945573 is an equidigital number, since it uses as much as digits as its factorization.

2551945573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945000, while the sum is 46.

The square root of 2551945573 is about 50516.7850619970. The cubic root of 2551945573 is about 1366.5445754572.

The spelling of 2551945573 in words is "two billion, five hundred fifty-one million, nine hundred forty-five thousand, five hundred seventy-three".