2134517857 has 4 divisors (see below), whose sum is σ = 2136585220. Its totient is φ = 2132450496.

The previous prime is 2134517849. The next prime is 2134517863. The reversal of 2134517857 is 7587154312.

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 1511965456 + 622552401 = 38884^2 + 24951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134517857 - 2³ = 2134517849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2134217857) 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, 1032132 + ... + 1034197.

It is an arithmetic number, because the mean of its divisors is an integer number (534146305).

Almost surely, 2^2134517857 is an apocalyptic number.

It is an amenable number.

2134517857 is a deficient number, since it is larger than the sum of its proper divisors (2067363).

2134517857 is a wasteful number, since it uses less digits than its factorization.

2134517857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067362.

The product of its digits is 235200, while the sum is 43.

The square root of 2134517857 is about 46200.8426005414. The cubic root of 2134517857 is about 1287.5573947707.

The spelling of 2134517857 in words is "two billion, one hundred thirty-four million, five hundred seventeen thousand, eight hundred fifty-seven".