51123560 has 32 divisors (see below), whose sum is σ = 117707040. Its totient is φ = 19973184.

The previous prime is 51123511. The next prime is 51123599. The reversal of 51123560 is 6532115.

It is a super-2 number, since 2×51123560² = 5227236774147200, which contains 22 as substring.

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, 13142 + ... + 16581.

It is an arithmetic number, because the mean of its divisors is an integer number (3678345).

Almost surely, 2^51123560 is an apocalyptic number.

It is an amenable number.

51123560 is an abundant number, since it is smaller than the sum of its proper divisors (66583480).

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

51123560 is a wasteful number, since it uses less digits than its factorization.

51123560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29777 (or 29773 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51123560 is about 7150.0741254899. The cubic root of 51123560 is about 371.1422213937.

Adding to 51123560 its reverse (6532115), we get a palindrome (57655675).

The spelling of 51123560 in words is "fifty-one million, one hundred twenty-three thousand, five hundred sixty".