51101212 has 6 divisors (see below), whose sum is σ = 89427128. Its totient is φ = 25550604.

The previous prime is 51101207. The next prime is 51101213. The reversal of 51101212 is 21210115.

It is a super-2 number, since 2×51101212² = 5222667735737888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51101192 and 51101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6387648 + ... + 6387655.

Almost surely, 2^51101212 is an apocalyptic number.

It is an amenable number.

51101212 is a deficient number, since it is larger than the sum of its proper divisors (38325916).

51101212 is a wasteful number, since it uses less digits than its factorization.

51101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12775307 (or 12775305 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 51101212 is about 7148.5111736641. The cubic root of 51101212 is about 371.0881335117.

Adding to 51101212 its reverse (21210115), we get a palindrome (72311327).

The spelling of 51101212 in words is "fifty-one million, one hundred one thousand, two hundred twelve".