51981914 has 8 divisors (see below), whose sum is σ = 78054528. Its totient is φ = 25963740.

The previous prime is 51981911. The next prime is 51981959. The reversal of 51981914 is 41918915.

51981914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51981911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11132 + ... + 15095.

It is an arithmetic number, because the mean of its divisors is an integer number (9756816).

Almost surely, 2^51981914 is an apocalyptic number.

51981914 is a deficient number, since it is larger than the sum of its proper divisors (26072614).

51981914 is a wasteful number, since it uses less digits than its factorization.

51981914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27220.

The product of its digits is 12960, while the sum is 38.

The square root of 51981914 is about 7209.8484033993. The cubic root of 51981914 is about 373.2078374608.

The spelling of 51981914 in words is "fifty-one million, nine hundred eighty-one thousand, nine hundred fourteen".