51771000 has 64 divisors (see below), whose sum is σ = 161534880. Its totient is φ = 13804800.

The previous prime is 51770977. The next prime is 51771007. The reversal of 51771000 is 17715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51771007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5629 + ... + 11628.

Almost surely, 2^51771000 is an apocalyptic number.

51771000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51771000 is an abundant number, since it is smaller than the sum of its proper divisors (109763880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51771000 is a wasteful number, since it uses less digits than its factorization.

51771000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17281 (or 17267 counting only the distinct ones).

The product of its (nonzero) digits is 245, while the sum is 21.

The square root of 51771000 is about 7195.2067378221. The cubic root of 51771000 is about 372.7023959025.

Adding to 51771000 its reverse (17715), we get a palindrome (51788715).

It can be divided in two parts, 517 and 71000, that added together give a palindrome (71517).

The spelling of 51771000 in words is "fifty-one million, seven hundred seventy-one thousand".