51942816 has 96 divisors (see below), whose sum is σ = 153619200. Its totient is φ = 17072640.

The previous prime is 51942773. The next prime is 51942851. The reversal of 51942816 is 61824915.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51942816² = 5396112268019712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 67876 + ... + 68636.

It is an arithmetic number, because the mean of its divisors is an integer number (1600200).

Almost surely, 2^51942816 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 51942816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76809600).

51942816 is an abundant number, since it is smaller than the sum of its proper divisors (101676384).

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

51942816 is a wasteful number, since it uses less digits than its factorization.

51942816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 845 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 51942816 is about 7207.1364632564. The cubic root of 51942816 is about 373.1142450373.

The spelling of 51942816 in words is "fifty-one million, nine hundred forty-two thousand, eight hundred sixteen".