51420550 has 12 divisors (see below), whose sum is σ = 95642316. Its totient is φ = 20568200.

The previous prime is 51420541. The next prime is 51420553. The reversal of 51420550 is 5502415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51420553) 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 5 ways as a sum of consecutive naturals, for example, 514156 + ... + 514255.

It is an arithmetic number, because the mean of its divisors is an integer number (7970193).

Almost surely, 2^51420550 is an apocalyptic number.

51420550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51420550 is a deficient number, since it is larger than the sum of its proper divisors (44221766).

51420550 is a wasteful number, since it uses less digits than its factorization.

51420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028423 (or 1028418 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51420550 is about 7170.8123668103. The cubic root of 51420550 is about 371.8595212821.

Adding to 51420550 its reverse (5502415), we get a palindrome (56922965).

The spelling of 51420550 in words is "fifty-one million, four hundred twenty thousand, five hundred fifty".