51000550 has 12 divisors (see below), whose sum is σ = 94861116. Its totient is φ = 20400200.

The previous prime is 51000539. The next prime is 51000557. The reversal of 51000550 is 5500015.

It is a super-2 number, since 2×51000550² = 5202112200605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000557) 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, 509956 + ... + 510055.

It is an arithmetic number, because the mean of its divisors is an integer number (7905093).

Almost surely, 2^51000550 is an apocalyptic number.

51000550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51000550 is a deficient number, since it is larger than the sum of its proper divisors (43860566).

51000550 is a wasteful number, since it uses less digits than its factorization.

51000550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020023 (or 1020018 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 51000550 is about 7141.4669361413. The cubic root of 51000550 is about 370.8443100175.

Adding to 51000550 its reverse (5500015), we get a palindrome (56500565).

The spelling of 51000550 in words is "fifty-one million, five hundred fifty", and thus it is an aban number.