51069872 has 80 divisors (see below), whose sum is σ = 120706560. Its totient is φ = 20445696.

The previous prime is 51069857. The next prime is 51069881. The reversal of 51069872 is 27896015.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219068 + ... + 219300.

It is an arithmetic number, because the mean of its divisors is an integer number (1508832).

Almost surely, 2^51069872 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 51069872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60353280).

51069872 is an abundant number, since it is smaller than the sum of its proper divisors (69636688).

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

51069872 is a wasteful number, since it uses less digits than its factorization.

51069872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51069872 is about 7146.3187726269. The cubic root of 51069872 is about 371.0122561175.

The spelling of 51069872 in words is "fifty-one million, sixty-nine thousand, eight hundred seventy-two".