51010100 has 18 divisors (see below), whose sum is σ = 110692134. Its totient is φ = 20404000.

The previous prime is 51010061. The next prime is 51010103. The reversal of 51010100 is 101015.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1936 + 51008164 = 44^2 + 7142^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51010103) 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, 254951 + ... + 255150.

It is an arithmetic number, because the mean of its divisors is an integer number (6149563).

Almost surely, 2^51010100 is an apocalyptic number.

51010100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51010100 is an abundant number, since it is smaller than the sum of its proper divisors (59682034).

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

51010100 is a wasteful number, since it uses less digits than its factorization.

51010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510115 (or 510108 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 51010100 is about 7142.1355349783. The cubic root of 51010100 is about 370.8674557949.

Adding to 51010100 its reverse (101015), we get a palindrome (51111115).

The spelling of 51010100 in words is "fifty-one million, ten thousand, one hundred".