51771573 has 12 divisors (see below), whose sum is σ = 85464288. Its totient is φ = 29583720.

The previous prime is 51771563. The next prime is 51771617. The reversal of 51771573 is 37517715.

It is a happy number.

51771573 is a `hidden beast` number, since 5 + 17 + 71 + 573 = 666.

It is not a de Polignac number, because 51771573 - 2⁴ = 51771557 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51771553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410823 + ... + 410948.

It is an arithmetic number, because the mean of its divisors is an integer number (7122024).

Almost surely, 2^51771573 is an apocalyptic number.

It is an amenable number.

51771573 is a deficient number, since it is larger than the sum of its proper divisors (33692715).

51771573 is a wasteful number, since it uses less digits than its factorization.

51771573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821784 (or 821781 counting only the distinct ones).

The product of its digits is 25725, while the sum is 36.

The square root of 51771573 is about 7195.2465558867. The cubic root of 51771573 is about 372.7037709173.

The spelling of 51771573 in words is "fifty-one million, seven hundred seventy-one thousand, five hundred seventy-three".