51231180 has 192 divisors, whose sum is σ = 192826368. Its totient is φ = 9815040.

The previous prime is 51231161. The next prime is 51231203. The reversal of 51231180 is 8113215.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59634 + ... + 60486.

It is an arithmetic number, because the mean of its divisors is an integer number (1004304).

Almost surely, 2^51231180 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 51231180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96413184).

51231180 is an abundant number, since it is smaller than the sum of its proper divisors (141595188).

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

51231180 is a wasteful number, since it uses less digits than its factorization.

51231180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 51231180 is about 7157.5959651268. The cubic root of 51231180 is about 371.4024688616.

Adding to 51231180 its reverse (8113215), we get a palindrome (59344395).

The spelling of 51231180 in words is "fifty-one million, two hundred thirty-one thousand, one hundred eighty".