51771825 has 48 divisors (see below), whose sum is σ = 108703360. Its totient is φ = 23664960.

The previous prime is 51771821. The next prime is 51771877. The reversal of 51771825 is 52817715.

It is not a de Polignac number, because 51771825 - 2² = 51771821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51771825.

It is not an unprimeable number, because it can be changed into a prime (51771821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 754 + ... + 10203.

Almost surely, 2^51771825 is an apocalyptic number.

It is an amenable number.

51771825 is an abundant number, since it is smaller than the sum of its proper divisors (56931535).

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

51771825 is a wasteful number, since it uses less digits than its factorization.

51771825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10983 (or 10972 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 51771825 is about 7195.2640674266. The cubic root of 51771825 is about 372.7043756327.

The spelling of 51771825 in words is "fifty-one million, seven hundred seventy-one thousand, eight hundred twenty-five".