51201133 has 2 divisors, whose sum is σ = 51201134. Its totient is φ = 51201132.

The previous prime is 51201131. The next prime is 51201149. The reversal of 51201133 is 33110215.

It is an a-pointer prime, because the next prime (51201149) can be obtained adding 51201133 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32512804 + 18688329 = 5702^2 + 4323^2 .

It is a cyclic number.

It is not a de Polignac number, because 51201133 - 2¹ = 51201131 is a prime.

Together with 51201131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51201131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600566 + 25600567.

It is an arithmetic number, because the mean of its divisors is an integer number (25600567).

Almost surely, 2^51201133 is an apocalyptic number.

It is an amenable number.

51201133 is a deficient number, since it is larger than the sum of its proper divisors (1).

51201133 is an equidigital number, since it uses as much as digits as its factorization.

51201133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 51201133 is about 7155.4966983432. The cubic root of 51201133 is about 371.3298456897.

Adding to 51201133 its reverse (33110215), we get a palindrome (84311348).

The spelling of 51201133 in words is "fifty-one million, two hundred one thousand, one hundred thirty-three".