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51380224 = 22072
BaseRepresentation
bin1100010000000…
…0000000000000
310120200101102021
43010000000000
5101123131344
65033131224
71162503400
oct304000000
9116611367
1051380224
11270037a5
1215259b14
13a84c6cc
146b76800
15479db84
hex3100000

51380224 has 63 divisors (see below), whose sum is σ = 119537607. Its totient is φ = 22020096.

The previous prime is 51380179. The next prime is 51380233. The reversal of 51380224 is 42208315.

The square root of 51380224 is 7168.

It is a perfect power (a square), and thus also a powerful number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7340029 + ... + 7340035.

Almost surely, 251380224 is an apocalyptic number.

51380224 is the 7168-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51380224

51380224 is an abundant number, since it is smaller than the sum of its proper divisors (68157383).

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

51380224 is an frugal number, since it uses more digits than its factorization.

51380224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 9 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The cubic root of 51380224 is about 371.7622869481.

Multiplying 51380224 by its sum of digits (25), we get a square (1284505600 = 358402).

Adding to 51380224 its reverse (42208315), we get a palindrome (93588539).

The spelling of 51380224 in words is "fifty-one million, three hundred eighty thousand, two hundred twenty-four".