2857145509 has 2 divisors, whose sum is σ = 2857145510. Its totient is φ = 2857145508.

The previous prime is 2857145461. The next prime is 2857145519. The reversal of 2857145509 is 9055417582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2372177025 + 484968484 = 48705^2 + 22022^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857145509 - 2⁷ = 2857145381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857145519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428572754 + 1428572755.

It is an arithmetic number, because the mean of its divisors is an integer number (1428572755).

Almost surely, 2^2857145509 is an apocalyptic number.

It is an amenable number.

2857145509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857145509 is an equidigital number, since it uses as much as digits as its factorization.

2857145509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 46.

The square root of 2857145509 is about 53452.2731883313. The cubic root of 2857145509 is about 1418.9838509801.

The spelling of 2857145509 in words is "two billion, eight hundred fifty-seven million, one hundred forty-five thousand, five hundred nine".