51971910 has 16 divisors (see below), whose sum is σ = 124732656. Its totient is φ = 13859168.

The previous prime is 51971879. The next prime is 51971911. The reversal of 51971910 is 1917915.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51971911) 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 7 ways as a sum of consecutive naturals, for example, 866169 + ... + 866228.

It is an arithmetic number, because the mean of its divisors is an integer number (7795791).

Almost surely, 2^51971910 is an apocalyptic number.

51971910 is an abundant number, since it is smaller than the sum of its proper divisors (72760746).

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

51971910 is a wasteful number, since it uses less digits than its factorization.

51971910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732407.

The product of its (nonzero) digits is 2835, while the sum is 33.

The square root of 51971910 is about 7209.1545967610. The cubic root of 51971910 is about 373.1838944490.

The spelling of 51971910 in words is "fifty-one million, nine hundred seventy-one thousand, nine hundred ten".