2557172427 has 4 divisors (see below), whose sum is σ = 3409563240. Its totient is φ = 1704781616.

The previous prime is 2557172393. The next prime is 2557172441. The reversal of 2557172427 is 7242717552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2557172427 - 2¹⁰ = 2557171403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2557172477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426195402 + ... + 426195407.

It is an arithmetic number, because the mean of its divisors is an integer number (852390810).

Almost surely, 2^2557172427 is an apocalyptic number.

2557172427 is a deficient number, since it is larger than the sum of its proper divisors (852390813).

2557172427 is an equidigital number, since it uses as much as digits as its factorization.

2557172427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852390812.

The product of its digits is 274400, while the sum is 42.

The square root of 2557172427 is about 50568.4924335302. The cubic root of 2557172427 is about 1367.4769174393.

Adding to 2557172427 its reverse (7242717552), we get a palindrome (9799889979).

The spelling of 2557172427 in words is "two billion, five hundred fifty-seven million, one hundred seventy-two thousand, four hundred twenty-seven".