51411780 has 288 divisors, whose sum is σ = 195350400. Its totient is φ = 11176704.

The previous prime is 51411769. The next prime is 51411781. The reversal of 51411780 is 8711415.

It is a super-2 number, since 2×51411780² = 5286342245536800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51411781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 767307 + ... + 767373.

It is an arithmetic number, because the mean of its divisors is an integer number (678300).

Almost surely, 2^51411780 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 51411780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97675200).

51411780 is an abundant number, since it is smaller than the sum of its proper divisors (143938620).

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

51411780 is a wasteful number, since it uses less digits than its factorization.

51411780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 51411780 is about 7170.2008340074. The cubic root of 51411780 is about 371.8383793235.

The spelling of 51411780 in words is "fifty-one million, four hundred eleven thousand, seven hundred eighty".