51212608 has 56 divisors (see below), whose sum is σ = 107853480. Its totient is φ = 24084480.

The previous prime is 51212599. The next prime is 51212627. The reversal of 51212608 is 80621215.

It can be written as a sum of positive squares in 4 ways, for example, as 61504 + 51151104 = 248^2 + 7152^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75760 + ... + 76432.

It is an arithmetic number, because the mean of its divisors is an integer number (1925955).

Almost surely, 2^51212608 is an apocalyptic number.

51212608 is a gapful number since it is divisible by the number (58) 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 51212608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53926740).

51212608 is an abundant number, since it is smaller than the sum of its proper divisors (56640872).

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

51212608 is a wasteful number, since it uses less digits than its factorization.

51212608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51212608 is about 7156.2984845519. The cubic root of 51212608 is about 371.3575839542.

The spelling of 51212608 in words is "fifty-one million, two hundred twelve thousand, six hundred eight".