51102212 has 12 divisors (see below), whose sum is σ = 102204480. Its totient is φ = 21900936.

The previous prime is 51102211. The next prime is 51102223. The reversal of 51102212 is 21220115.

51102212 is an admirable number.

It is a super-2 number, since 2×51102212² = 5222872142585888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (51102211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912512 + ... + 912567.

It is an arithmetic number, because the mean of its divisors is an integer number (8517040).

Almost surely, 2^51102212 is an apocalyptic number.

It is an amenable number.

51102212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51102212 is a wasteful number, since it uses less digits than its factorization.

51102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825090 (or 1825088 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 51102212 is about 7148.5811179562. The cubic root of 51102212 is about 371.0905541048.

Adding to 51102212 its reverse (21220115), we get a palindrome (72322327).

The spelling of 51102212 in words is "fifty-one million, one hundred two thousand, two hundred twelve".