51071712 has 24 divisors (see below), whose sum is σ = 134063496. Its totient is φ = 17023872.

The previous prime is 51071693. The next prime is 51071717. The reversal of 51071712 is 21717015.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×51071712² = 5216639533221888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071717) 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 3 ways as a sum of consecutive naturals, for example, 265903 + ... + 266094.

It is an arithmetic number, because the mean of its divisors is an integer number (5585979).

Almost surely, 2^51071712 is an apocalyptic number.

It is an amenable number.

51071712 is an abundant number, since it is smaller than the sum of its proper divisors (82991784).

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

51071712 is a wasteful number, since it uses less digits than its factorization.

51071712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532010 (or 532002 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 51071712 is about 7146.4475090775. The cubic root of 51071712 is about 371.0167118062.

Adding to 51071712 its reverse (21717015), we get a palindrome (72788727).

The spelling of 51071712 in words is "fifty-one million, seventy-one thousand, seven hundred twelve".