51737856 has 144 divisors (see below), whose sum is σ = 150111360. Its totient is φ = 15769600.

The previous prime is 51737849. The next prime is 51737863. The reversal of 51737856 is 65873715.

It is an interprime number because it is at equal distance from previous prime (51737849) and next prime (51737863).

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, 512206 + ... + 512306.

It is an arithmetic number, because the mean of its divisors is an integer number (1042440).

Almost surely, 2^51737856 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 51737856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75055680).

51737856 is an abundant number, since it is smaller than the sum of its proper divisors (98373504).

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

51737856 is a wasteful number, since it uses less digits than its factorization.

51737856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 158 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 51737856 is about 7192.9031690966. The cubic root of 51737856 is about 372.6228437384.

The spelling of 51737856 in words is "fifty-one million, seven hundred thirty-seven thousand, eight hundred fifty-six".