51201928 has 8 divisors (see below), whose sum is σ = 96003630. Its totient is φ = 25600960.

The previous prime is 51201923. The next prime is 51201947. The reversal of 51201928 is 82910215.

It can be written as a sum of positive squares in only one way, i.e., 47032164 + 4169764 = 6858^2 + 2042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 51201896 and 51201905.

It is not an unprimeable number, because it can be changed into a prime (51201923) by changing a digit.

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 as a sum of consecutive naturals, namely, 3200113 + ... + 3200128.

Almost surely, 2^51201928 is an apocalyptic number.

It is an amenable number.

51201928 is a deficient number, since it is larger than the sum of its proper divisors (44801702).

51201928 is a wasteful number, since it uses less digits than its factorization.

51201928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400247 (or 6400243 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51201928 is about 7155.5522498267. The cubic root of 51201928 is about 371.3317675593.

The spelling of 51201928 in words is "fifty-one million, two hundred one thousand, nine hundred twenty-eight".