51005552 has 40 divisors (see below), whose sum is σ = 107128560. Its totient is φ = 23524800.

The previous prime is 51005551. The next prime is 51005561. The reversal of 51005552 is 25550015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34427 + ... + 35877.

It is an arithmetic number, because the mean of its divisors is an integer number (2678214).

Almost surely, 2^51005552 is an apocalyptic number.

51005552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51005552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53564280).

51005552 is an abundant number, since it is smaller than the sum of its proper divisors (56123008).

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

51005552 is a wasteful number, since it uses less digits than its factorization.

51005552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 51005552 is about 7141.8171357155. The cubic root of 51005552 is about 370.8564334331.

Adding to 51005552 its reverse (25550015), we get a palindrome (76555567).

The spelling of 51005552 in words is "fifty-one million, five thousand, five hundred fifty-two".