51400232 has 64 divisors (see below), whose sum is σ = 108864000. Its totient is φ = 22590720.

The previous prime is 51400229. The next prime is 51400241. The reversal of 51400232 is 23200415.

It is a self number, because there is not a number n which added to its sum of digits gives 51400232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344894 + ... + 345042.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^51400232 is an apocalyptic number.

51400232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51400232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54432000).

51400232 is an abundant number, since it is smaller than the sum of its proper divisors (57463768).

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

51400232 is a wasteful number, since it uses less digits than its factorization.

51400232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51400232 is about 7169.3955114779. The cubic root of 51400232 is about 371.8105367347.

Adding to 51400232 its reverse (23200415), we get a palindrome (74600647).

The spelling of 51400232 in words is "fifty-one million, four hundred thousand, two hundred thirty-two".