51122864 has 20 divisors (see below), whose sum is σ = 106670256. Its totient is φ = 23595072.

The previous prime is 51122861. The next prime is 51122873. The reversal of 51122864 is 46822115.

It is a super-2 number, since 2×51122864² = 5227094447124992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51122861) 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, 122684 + ... + 123099.

Almost surely, 2^51122864 is an apocalyptic number.

It is an amenable number.

51122864 is an abundant number, since it is smaller than the sum of its proper divisors (55547392).

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

51122864 is a wasteful number, since it uses less digits than its factorization.

51122864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245804 (or 245798 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 51122864 is about 7150.0254545001. The cubic root of 51122864 is about 371.1405371333.

Adding to 51122864 its reverse (46822115), we get a palindrome (97944979).

The spelling of 51122864 in words is "fifty-one million, one hundred twenty-two thousand, eight hundred sixty-four".