51771330 has 48 divisors (see below), whose sum is σ = 144963000. Its totient is φ = 12743424.

The previous prime is 51771329. The next prime is 51771337. The reversal of 51771330 is 3317715.

It can be written as a sum of positive squares in 4 ways, for example, as 15374241 + 36397089 = 3921^2 + 6033^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51771294 and 51771303.

It is not an unprimeable number, because it can be changed into a prime (51771337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20955 + ... + 23294.

Almost surely, 2^51771330 is an apocalyptic number.

51771330 is an abundant number, since it is smaller than the sum of its proper divisors (93191670).

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

51771330 is a wasteful number, since it uses less digits than its factorization.

51771330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44275 (or 44272 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 51771330 is about 7195.2296697187. The cubic root of 51771330 is about 372.7031877971.

The spelling of 51771330 in words is "fifty-one million, seven hundred seventy-one thousand, three hundred thirty".