2556430273 has 4 divisors (see below), whose sum is σ = 2598339028. Its totient is φ = 2514521520.

The previous prime is 2556430271. The next prime is 2556430277. The reversal of 2556430273 is 3720346552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67617729 + 2488812544 = 8223^2 + 49888^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556430273 - 2¹ = 2556430271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556430271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20954286 + ... + 20954407.

It is an arithmetic number, because the mean of its divisors is an integer number (649584757).

Almost surely, 2^2556430273 is an apocalyptic number.

It is an amenable number.

2556430273 is a deficient number, since it is larger than the sum of its proper divisors (41908755).

2556430273 is an equidigital number, since it uses as much as digits as its factorization.

2556430273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41908754.

The product of its (nonzero) digits is 151200, while the sum is 37.

The square root of 2556430273 is about 50561.1537941926. The cubic root of 2556430273 is about 1367.3446128868.

The spelling of 2556430273 in words is "two billion, five hundred fifty-six million, four hundred thirty thousand, two hundred seventy-three".