2557261307 has 4 divisors (see below), whose sum is σ = 2619633576. Its totient is φ = 2494889040.

The previous prime is 2557261283. The next prime is 2557261313. The reversal of 2557261307 is 7031627552.

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 2557261307 - 2⁸ = 2557261051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557221307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31186073 + ... + 31186154.

It is an arithmetic number, because the mean of its divisors is an integer number (654908394).

Almost surely, 2^2557261307 is an apocalyptic number.

2557261307 is a deficient number, since it is larger than the sum of its proper divisors (62372269).

2557261307 is an equidigital number, since it uses as much as digits as its factorization.

2557261307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62372268.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 2557261307 is about 50569.3712339792. The cubic root of 2557261307 is about 1367.4927604513.

Adding to 2557261307 its reverse (7031627552), we get a palindrome (9588888859).

The spelling of 2557261307 in words is "two billion, five hundred fifty-seven million, two hundred sixty-one thousand, three hundred seven".