51104040 has 256 divisors, whose sum is σ = 182891520. Its totient is φ = 11304960.

The previous prime is 51104033. The next prime is 51104041. The reversal of 51104040 is 4040115.

It is a super-2 number, since 2×51104040² = 5223245808643200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (51104041) 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 63 ways as a sum of consecutive naturals, for example, 1087297 + ... + 1087343.

It is an arithmetic number, because the mean of its divisors is an integer number (714420).

Almost surely, 2^51104040 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 51104040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

51104040 is an abundant number, since it is smaller than the sum of its proper divisors (131787480).

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

51104040 is a wasteful number, since it uses less digits than its factorization.

51104040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51104040 is about 7148.7089743533. The cubic root of 51104040 is about 371.0949788672.

Adding to 51104040 its reverse (4040115), we get a palindrome (55144155).

The spelling of 51104040 in words is "fifty-one million, one hundred four thousand, forty".