51490416 has 80 divisors (see below), whose sum is σ = 142624800. Its totient is φ = 15949824.

The previous prime is 51490409. The next prime is 51490451. The reversal of 51490416 is 61409415.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72270 + ... + 72978.

It is an arithmetic number, because the mean of its divisors is an integer number (1782810).

Almost surely, 2^51490416 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 51490416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71312400).

51490416 is an abundant number, since it is smaller than the sum of its proper divisors (91134384).

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

51490416 is a wasteful number, since it uses less digits than its factorization.

51490416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51490416 is about 7175.6822672133. The cubic root of 51490416 is about 372.0278624061.

The spelling of 51490416 in words is "fifty-one million, four hundred ninety thousand, four hundred sixteen".