51156416 has 42 divisors (see below), whose sum is σ = 106189272. Its totient is φ = 24449920.

The previous prime is 51156403. The next prime is 51156421. The reversal of 51156416 is 61465115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33101 + ... + 34611.

It is an arithmetic number, because the mean of its divisors is an integer number (2528316).

Almost surely, 2^51156416 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 51156416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53094636).

51156416 is an abundant number, since it is smaller than the sum of its proper divisors (55032856).

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

51156416 is a wasteful number, since it uses less digits than its factorization.

51156416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569 (or 1536 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 51156416 is about 7152.3713550123. The cubic root of 51156416 is about 371.2217127113.

The spelling of 51156416 in words is "fifty-one million, one hundred fifty-six thousand, four hundred sixteen".