51152212 has 6 divisors (see below), whose sum is σ = 89516378. Its totient is φ = 25576104.

The previous prime is 51152197. The next prime is 51152243. The reversal of 51152212 is 21225115.

It can be written as a sum of positive squares in only one way, i.e., 48944016 + 2208196 = 6996^2 + 1486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51152212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394023 + ... + 6394030.

Almost surely, 2^51152212 is an apocalyptic number.

It is an amenable number.

51152212 is a deficient number, since it is larger than the sum of its proper divisors (38364166).

51152212 is a wasteful number, since it uses less digits than its factorization.

51152212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12788057 (or 12788055 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 51152212 is about 7152.0774604306. The cubic root of 51152212 is about 371.2115435155.

Adding to 51152212 its reverse (21225115), we get a palindrome (72377327).

The spelling of 51152212 in words is "fifty-one million, one hundred fifty-two thousand, two hundred twelve".