51551010 has 96 divisors (see below), whose sum is σ = 156529152. Its totient is φ = 11525760.

The previous prime is 51550999. The next prime is 51551077. The reversal of 51551010 is 1015515.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 28740 + ... + 30480.

It is an arithmetic number, because the mean of its divisors is an integer number (1630512).

Almost surely, 2^51551010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51551010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78264576).

51551010 is an abundant number, since it is smaller than the sum of its proper divisors (104978142).

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

51551010 is a wasteful number, since it uses less digits than its factorization.

51551010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 51551010 is about 7179.9032026901. The cubic root of 51551010 is about 372.1737395167.

Adding to 51551010 its reverse (1015515), we get a palindrome (52566525).

The spelling of 51551010 in words is "fifty-one million, five hundred fifty-one thousand, ten".