51223061 has 2 divisors, whose sum is σ = 51223062. Its totient is φ = 51223060.

The previous prime is 51223049. The next prime is 51223111. The reversal of 51223061 is 16032215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34000561 + 17222500 = 5831^2 + 4150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51223061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51223661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611530 + 25611531.

It is an arithmetic number, because the mean of its divisors is an integer number (25611531).

Almost surely, 2^51223061 is an apocalyptic number.

It is an amenable number.

51223061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51223061 is an equidigital number, since it uses as much as digits as its factorization.

51223061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51223061 is about 7157.0287829518. The cubic root of 51223061 is about 371.3828481544.

Adding to 51223061 its reverse (16032215), we get a palindrome (67255276).

The spelling of 51223061 in words is "fifty-one million, two hundred twenty-three thousand, sixty-one".