51223150400 has 84 divisors (see below), whose sum is σ = 126175117728. Its totient is φ = 20467453440.

The previous prime is 51223150387. The next prime is 51223150403. The reversal of 51223150400 is 405132215.

It is a super-2 number, since 2×51223150400² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223150403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1530647 + ... + 1563753.

Almost surely, 2^51223150400 is an apocalyptic number.

51223150400 is a gapful number since it is divisible by the number (50) 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 51223150400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63087558864).

51223150400 is an abundant number, since it is smaller than the sum of its proper divisors (74951967328).

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

51223150400 is a wasteful number, since it uses less digits than its factorization.

51223150400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34096 (or 34081 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 51223150400 its reverse (405132215), we get a palindrome (51628282615).

The spelling of 51223150400 in words is "fifty-one billion, two hundred twenty-three million, one hundred fifty thousand, four hundred".