51397824 has 112 divisors (see below), whose sum is σ = 144548352. Its totient is φ = 16084992.

The previous prime is 51397813. The next prime is 51397867. The reversal of 51397824 is 42879315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454792 + ... + 454904.

Almost surely, 2^51397824 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 51397824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72274176).

51397824 is an abundant number, since it is smaller than the sum of its proper divisors (93150528).

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

51397824 is a wasteful number, since it uses less digits than its factorization.

51397824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 244 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 51397824 is about 7169.2275734559. The cubic root of 51397824 is about 371.8047304461.

The spelling of 51397824 in words is "fifty-one million, three hundred ninety-seven thousand, eight hundred twenty-four".