2557403197 has 2 divisors, whose sum is σ = 2557403198. Its totient is φ = 2557403196.

The previous prime is 2557403159. The next prime is 2557403213. The reversal of 2557403197 is 7913047552.

2557403197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308558276 + 1248844921 = 36174^2 + 35339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557403197 is a prime.

It is a super-2 number, since 2×2557403197² = 13080622224051641618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557403297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278701598 + 1278701599.

It is an arithmetic number, because the mean of its divisors is an integer number (1278701599).

Almost surely, 2^2557403197 is an apocalyptic number.

It is an amenable number.

2557403197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557403197 is an equidigital number, since it uses as much as digits as its factorization.

2557403197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 2557403197 is about 50570.7741388245. The cubic root of 2557403197 is about 1367.5180518256.

The spelling of 2557403197 in words is "two billion, five hundred fifty-seven million, four hundred three thousand, one hundred ninety-seven".