51123060 has 72 divisors (see below), whose sum is σ = 155990016. Its totient is φ = 13552320.

The previous prime is 51123047. The next prime is 51123067. The reversal of 51123060 is 6032115.

It is a super-2 number, since 2×51123060² = 5227134527527200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123067) 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 23 ways as a sum of consecutive naturals, for example, 33637 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (2166528).

Almost surely, 2^51123060 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51123060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77995008).

51123060 is an abundant number, since it is smaller than the sum of its proper divisors (104866956).

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

51123060 is a wasteful number, since it uses less digits than its factorization.

51123060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 51123060 is about 7150.0391607319. The cubic root of 51123060 is about 371.1410114381.

Adding to 51123060 its reverse (6032115), we get a palindrome (57155175).

The spelling of 51123060 in words is "fifty-one million, one hundred twenty-three thousand, sixty".