51111415521200 has 30 divisors (see below), whose sum is σ = 122795175790644. Its totient is φ = 20444566208320.

The previous prime is 51111415521181. The next prime is 51111415521203. The reversal of 51111415521200 is 212551411115.

It is a super-2 number, since 2×51111415521200² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51111415521203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63889269002 + ... + 63889269801.

Almost surely, 2^{51111415521200} is an apocalyptic number.

51111415521200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51111415521200 is an abundant number, since it is smaller than the sum of its proper divisors (71683760269444).

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

51111415521200 is a wasteful number, since it uses less digits than its factorization.

51111415521200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127778538821 (or 127778538810 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 29.

Adding to 51111415521200 its reverse (212551411115), we get a palindrome (51323966932315).

The spelling of 51111415521200 in words is "fifty-one trillion, one hundred eleven billion, four hundred fifteen million, five hundred twenty-one thousand, two hundred".