51481722 has 8 divisors (see below), whose sum is σ = 102963456. Its totient is φ = 17160572.

The previous prime is 51481721. The next prime is 51481733. The reversal of 51481722 is 22718415.

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

51481722 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51481722.

It is not an unprimeable number, because it can be changed into a prime (51481721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290138 + ... + 4290149.

It is an arithmetic number, because the mean of its divisors is an integer number (12870432).

Almost surely, 2^51481722 is an apocalyptic number.

51481722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51481722 is a wasteful number, since it uses less digits than its factorization.

51481722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580292.

The product of its digits is 4480, while the sum is 30.

The square root of 51481722 is about 7175.0764455858. The cubic root of 51481722 is about 372.0069226368.

The spelling of 51481722 in words is "fifty-one million, four hundred eighty-one thousand, seven hundred twenty-two".