51118452 has 144 divisors (see below), whose sum is σ = 167311872. Its totient is φ = 13258080.

The previous prime is 51118433. The next prime is 51118453. The reversal of 51118452 is 25481115.

It is a super-2 number, since 2×51118452² = 5226192269752608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51118453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74503 + ... + 75185.

It is an arithmetic number, because the mean of its divisors is an integer number (1161888).

Almost surely, 2^51118452 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 51118452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83655936).

51118452 is an abundant number, since it is smaller than the sum of its proper divisors (116193420).

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

51118452 is a wasteful number, since it uses less digits than its factorization.

51118452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 706 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 51118452 is about 7149.7169174730. The cubic root of 51118452 is about 371.1298601157.

Adding to 51118452 its reverse (25481115), we get a palindrome (76599567).

The spelling of 51118452 in words is "fifty-one million, one hundred eighteen thousand, four hundred fifty-two".