2557135129 has 4 divisors (see below), whose sum is σ = 2557359540. Its totient is φ = 2556910720.

The previous prime is 2557135103. The next prime is 2557135151. The reversal of 2557135129 is 9215317552.

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 1678131225 + 879003904 = 40965^2 + 29648^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557135129 - 2¹³ = 2557126937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2557135091 and 2557135100.

It is not an unprimeable number, because it can be changed into a prime (2557135429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94144 + ... + 118225.

It is an arithmetic number, because the mean of its divisors is an integer number (639339885).

Almost surely, 2^2557135129 is an apocalyptic number.

It is an amenable number.

2557135129 is a deficient number, since it is larger than the sum of its proper divisors (224411).

2557135129 is a wasteful number, since it uses less digits than its factorization.

2557135129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224410.

The product of its digits is 94500, while the sum is 40.

The square root of 2557135129 is about 50568.1236452372. The cubic root of 2557135129 is about 1367.4702688976.

The spelling of 2557135129 in words is "two billion, five hundred fifty-seven million, one hundred thirty-five thousand, one hundred twenty-nine".