51971796 has 36 divisors (see below), whose sum is σ = 132268500. Its totient is φ = 17205888.

The previous prime is 51971767. The next prime is 51971813. The reversal of 51971796 is 69717915.

It can be written as a sum of positive squares in 2 ways, for example, as 16402500 + 35569296 = 4050^2 + 5964^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 520 + ... + 10208.

It is an arithmetic number, because the mean of its divisors is an integer number (3674125).

Almost surely, 2^51971796 is an apocalyptic number.

It is an amenable number.

51971796 is an abundant number, since it is smaller than the sum of its proper divisors (80296704).

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

51971796 is a wasteful number, since it uses less digits than its factorization.

51971796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9848 (or 9843 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 51971796 is about 7209.1466901430. The cubic root of 51971796 is about 373.1836215901.

The spelling of 51971796 in words is "fifty-one million, nine hundred seventy-one thousand, seven hundred ninety-six".