51133123400 has 24 divisors (see below), whose sum is σ = 118884512370. Its totient is φ = 20453249280.

The previous prime is 51133123369. The next prime is 51133123429. The reversal of 51133123400 is 432133115.

It can be written as a sum of positive squares in 3 ways, for example, as 34262750404 + 16870372996 = 185102^2 + 129886^2 .

It is a super-2 number, since 2×51133123400² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 127832609 + ... + 127833008.

Almost surely, 2^51133123400 is an apocalyptic number.

51133123400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51133123400 is an abundant number, since it is smaller than the sum of its proper divisors (67751388970).

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

51133123400 is a wasteful number, since it uses less digits than its factorization.

51133123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255665633 (or 255665624 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 51133123400 its reverse (432133115), we get a palindrome (51565256515).

The spelling of 51133123400 in words is "fifty-one billion, one hundred thirty-three million, one hundred twenty-three thousand, four hundred".