51975321 has 16 divisors (see below), whose sum is σ = 70273344. Its totient is φ = 34167744.

The previous prime is 51975299. The next prime is 51975353. The reversal of 51975321 is 12357915.

It is not a de Polignac number, because 51975321 - 2⁵ = 51975289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51975821) 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 in 15 ways as a sum of consecutive naturals, for example, 76435 + ... + 77111.

It is an arithmetic number, because the mean of its divisors is an integer number (4392084).

Almost surely, 2^51975321 is an apocalyptic number.

It is an amenable number.

51975321 is a deficient number, since it is larger than the sum of its proper divisors (18298023).

51975321 is a wasteful number, since it uses less digits than its factorization.

51975321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000.

The product of its digits is 9450, while the sum is 33.

The square root of 51975321 is about 7209.3911670820. The cubic root of 51975321 is about 373.1920584900.

The spelling of 51975321 in words is "fifty-one million, nine hundred seventy-five thousand, three hundred twenty-one".