51308352 has 84 divisors (see below), whose sum is σ = 148055076. Its totient is φ = 16988160.

The previous prime is 51308321. The next prime is 51308357. The reversal of 51308352 is 25380315.

51308352 is a `hidden beast` number, since 5 + 1 + 308 + 352 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16451136 + 34857216 = 4056^2 + 5904^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51308357) 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, 161698 + ... + 162014.

Almost surely, 2^51308352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51308352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74027538).

51308352 is an abundant number, since it is smaller than the sum of its proper divisors (96746724).

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

51308352 is a wasteful number, since it uses less digits than its factorization.

51308352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51308352 is about 7162.9848526993. The cubic root of 51308352 is about 371.5888624587.

Adding to 51308352 its reverse (25380315), we get a palindrome (76688667).

The spelling of 51308352 in words is "fifty-one million, three hundred eight thousand, three hundred fifty-two".