51536213 has 2 divisors, whose sum is σ = 51536214. Its totient is φ = 51536212.

The previous prime is 51536209. The next prime is 51536237. The reversal of 51536213 is 31263515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27112849 + 24423364 = 5207^2 + 4942^2 .

It is a cyclic number.

It is not a de Polignac number, because 51536213 - 2² = 51536209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51536263) by changing a digit.

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 as a sum of consecutive naturals, namely, 25768106 + 25768107.

It is an arithmetic number, because the mean of its divisors is an integer number (25768107).

Almost surely, 2^51536213 is an apocalyptic number.

It is an amenable number.

51536213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51536213 is an equidigital number, since it uses as much as digits as its factorization.

51536213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 51536213 is about 7178.8726830889. The cubic root of 51536213 is about 372.1381270116.

Adding to 51536213 its reverse (31263515), we get a palindrome (82799728).

The spelling of 51536213 in words is "fifty-one million, five hundred thirty-six thousand, two hundred thirteen".