51061000550 has 48 divisors (see below), whose sum is σ = 112042447872. Its totient is φ = 16941895200.

The previous prime is 51061000489. The next prime is 51061000559. The reversal of 51061000550 is 5500016015.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061000559) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2342192 + ... + 2363891.

It is an arithmetic number, because the mean of its divisors is an integer number (2334217664).

Almost surely, 2^51061000550 is an apocalyptic number.

51061000550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51061000550 is an abundant number, since it is smaller than the sum of its proper divisors (60981447322).

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

51061000550 is a wasteful number, since it uses less digits than its factorization.

51061000550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4706133 (or 4706128 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 51061000550 its reverse (5500016015), we get a palindrome (56561016565).

The spelling of 51061000550 in words is "fifty-one billion, sixty-one million, five hundred fifty", and thus it is an aban number.