51010212 has 108 divisors (see below), whose sum is σ = 140990640. Its totient is φ = 14303520.

The previous prime is 51010177. The next prime is 51010237. The reversal of 51010212 is 21201015.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 1186263 + ... + 1186305.

Almost surely, 2^51010212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51010212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70495320).

51010212 is an abundant number, since it is smaller than the sum of its proper divisors (89980428).

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

51010212 is a wasteful number, since it uses less digits than its factorization.

51010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 51010212 is about 7142.1433757661. The cubic root of 51010212 is about 370.8677272256.

Adding to 51010212 its reverse (21201015), we get a palindrome (72211227).

The spelling of 51010212 in words is "fifty-one million, ten thousand, two hundred twelve".