51386212 has 12 divisors (see below), whose sum is σ = 89990460. Its totient is φ = 25674656.

The previous prime is 51386201. The next prime is 51386221. The reversal of 51386212 is 21268315.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 20738916 = 5536^2 + 4554^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078 + ... + 10594.

It is an arithmetic number, because the mean of its divisors is an integer number (7499205).

Almost surely, 2^51386212 is an apocalyptic number.

It is an amenable number.

51386212 is a deficient number, since it is larger than the sum of its proper divisors (38604248).

51386212 is a wasteful number, since it uses less digits than its factorization.

51386212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9230 (or 9228 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 51386212 is about 7168.4176775632. The cubic root of 51386212 is about 371.7767284713.

The spelling of 51386212 in words is "fifty-one million, three hundred eighty-six thousand, two hundred twelve".