51494688 has 216 divisors, whose sum is σ = 176461740. Its totient is φ = 14192640.

The previous prime is 51494671. The next prime is 51494719. The reversal of 51494688 is 88649415.

It can be written as a sum of positive squares in 2 ways, for example, as 41835024 + 9659664 = 6468^2 + 3108^2 .

Its product of digits (276480) is a multiple of the sum of its prime factors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 578548 + ... + 578636.

Almost surely, 2^51494688 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 51494688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88230870).

51494688 is an abundant number, since it is smaller than the sum of its proper divisors (124967052).

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

51494688 is a wasteful number, since it uses less digits than its factorization.

51494688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 142 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 51494688 is about 7175.9799330823. The cubic root of 51494688 is about 372.0381507872.

The spelling of 51494688 in words is "fifty-one million, four hundred ninety-four thousand, six hundred eighty-eight".