51775571 has 4 divisors (see below), whose sum is σ = 52065000. Its totient is φ = 51486144.

The previous prime is 51775567. The next prime is 51775609. The reversal of 51775571 is 17557715.

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 51775571 - 2² = 51775567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51775501) 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, 144446 + ... + 144803.

It is an arithmetic number, because the mean of its divisors is an integer number (13016250).

Almost surely, 2^51775571 is an apocalyptic number.

51775571 is a deficient number, since it is larger than the sum of its proper divisors (289429).

51775571 is a wasteful number, since it uses less digits than its factorization.

51775571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289428.

The product of its digits is 42875, while the sum is 38.

The square root of 51775571 is about 7195.5243728307. The cubic root of 51775571 is about 372.7133645433.

The spelling of 51775571 in words is "fifty-one million, seven hundred seventy-five thousand, five hundred seventy-one".