51655016 has 48 divisors (see below), whose sum is σ = 113294340. Its totient is φ = 22014720.

The previous prime is 51655013. The next prime is 51655067. The reversal of 51655016 is 61055615.

It can be written as a sum of positive squares in 2 ways, for example, as 29658916 + 21996100 = 5446^2 + 4690^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51655016.

It is not an unprimeable number, because it can be changed into a prime (51655013) 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, 122486 + ... + 122906.

Almost surely, 2^51655016 is an apocalyptic number.

51655016 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51655016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56647170).

51655016 is an abundant number, since it is smaller than the sum of its proper divisors (61639324).

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

51655016 is a wasteful number, since it uses less digits than its factorization.

51655016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 51655016 is about 7187.1424084959. The cubic root of 51655016 is about 372.4238626426.

The spelling of 51655016 in words is "fifty-one million, six hundred fifty-five thousand, sixteen".