51534857 has 4 divisors (see below), whose sum is σ = 56219856. Its totient is φ = 46849860.

The previous prime is 51534841. The next prime is 51534887. The reversal of 51534857 is 75843515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51534857 - 2⁴ = 51534841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51534857.

It is not an unprimeable number, because it can be changed into a prime (51534887) 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, 2342483 + ... + 2342504.

It is an arithmetic number, because the mean of its divisors is an integer number (14054964).

Almost surely, 2^51534857 is an apocalyptic number.

It is an amenable number.

51534857 is a deficient number, since it is larger than the sum of its proper divisors (4684999).

51534857 is a wasteful number, since it uses less digits than its factorization.

51534857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684998.

The product of its digits is 84000, while the sum is 38.

The square root of 51534857 is about 7178.7782386699. The cubic root of 51534857 is about 372.1348631337.

The spelling of 51534857 in words is "fifty-one million, five hundred thirty-four thousand, eight hundred fifty-seven".