51222047 has 2 divisors, whose sum is σ = 51222048. Its totient is φ = 51222046.

The previous prime is 51222001. The next prime is 51222107. The reversal of 51222047 is 74022215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51222047 - 2⁸ = 51221791 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 (51222247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611023 + 25611024.

It is an arithmetic number, because the mean of its divisors is an integer number (25611024).

Almost surely, 2^51222047 is an apocalyptic number.

51222047 is a deficient number, since it is larger than the sum of its proper divisors (1).

51222047 is an equidigital number, since it uses as much as digits as its factorization.

51222047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 51222047 is about 7156.9579431488. The cubic root of 51222047 is about 371.3803975349.

The spelling of 51222047 in words is "fifty-one million, two hundred twenty-two thousand, forty-seven".