51106720 has 48 divisors (see below), whose sum is σ = 137991168. Its totient is φ = 17521920.

The previous prime is 51106711. The next prime is 51106733. The reversal of 51106720 is 2760115.

It is a super-2 number, since 2×51106720² = 5223793658316800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51106691 and 51106700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21696 + ... + 23935.

It is an arithmetic number, because the mean of its divisors is an integer number (2874816).

Almost surely, 2^51106720 is an apocalyptic number.

It is an amenable number.

51106720 is an abundant number, since it is smaller than the sum of its proper divisors (86884448).

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

51106720 is a wasteful number, since it uses less digits than its factorization.

51106720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45653 (or 45645 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 51106720 is about 7148.8964183292. The cubic root of 51106720 is about 371.1014657461.

Adding to 51106720 its reverse (2760115), we get a palindrome (53866835).

The spelling of 51106720 in words is "fifty-one million, one hundred six thousand, seven hundred twenty".