51680222 has 8 divisors (see below), whose sum is σ = 84567672. Its totient is φ = 23491000.

The previous prime is 51680197. The next prime is 51680243. The reversal of 51680222 is 22208615.

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

It is a junction number, because it is equal to n+sod(n) for n = 51680191 and 51680200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174529 + ... + 1174572.

It is an arithmetic number, because the mean of its divisors is an integer number (10570959).

Almost surely, 2^51680222 is an apocalyptic number.

51680222 is a deficient number, since it is larger than the sum of its proper divisors (32887450).

51680222 is a wasteful number, since it uses less digits than its factorization.

51680222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349114.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 51680222 is about 7188.8957427410. The cubic root of 51680222 is about 372.4844297802.

Adding to 51680222 its reverse (22208615), we get a palindrome (73888837).

The spelling of 51680222 in words is "fifty-one million, six hundred eighty thousand, two hundred twenty-two".